My PC has been quite unreliable and slow for about a month and a half. I don't remember having done anything special before this started to happen. The symptoms suggest there might be a virus, but a full system scan with Panda shows nothing. In this time I have tried dozens of troubleshooting steps. They seem to have improved a bit the health of the PC, but overall the problems persist. Right now there are two major issues and three minor issues with which I need help. All of them seem to be connected in some way. Of course, the major issues have priority for me:
- Overall the PC is quite slow. The task manager shows high CPU usage even when the computer is idle (which is most of the time). The hard drive is busy for much longer than seems necessary for the PC workload.
- Many times when I restart the computer the screen goes blank. I switch it off using the power button and then start it again. After several attempts (anywhere between one and ten) the screen works again.
- My WiFi connection works poorly, it fails very often. A few weeks ago the usual WiFi icon changed into an Ethernet icon with a red cross, which would suggest that there is no connection. The icon is always there, regardless of whether I'm connected to the Internet or not. I attach the icon: Internet icon.png 798bytes 0 downloads
- Every time I start Windows it displays this error message: "Corrupted installer: invalid opcode". (That's my translation. I use a Spanish version of Windows. The actual message is “Instalador dañado: cód. Operación no válido”). A Google search suggests this is related to a Mozilla product. The only Mozilla product I have is Firefox, so that must be it.
- The icon of Microsoft Outlook has disappeared, although the program itself runs fine.
I keep a log of the stuff I do with my PC. I copy below the troubleshooting I've done so far in case it helps:
The computer is extremely slow. The task manager shows very high CPU usage even when the computer is idle, sometimes up to 100%. Also, the internet connection fails all the time, like every ten minutes, or even more often.
Solution tried: Windows repair install
Downloaded a Windows 7 SP1 Home Premium 64 bits retail ISO.
The repair install failed, so I requested help in sevenforums:
I'm stuck at step 12. The program complains of several compatibility issues. Some I could fix, but with others I don't know what to do. These are the ones I fixed:
- Network adapters: Surf Wireless Micro USB Adapter.
Updated driver, fixed.
- Network adapters: Realtek PCIe GBE Family Controller.
Updated driver, fixed.
- Compatibility issues with iTunes.
Uninstalled it, fixed.
And these the ones that keep me stuck:
- VNUSB Device: VN Series Device.
Don't even know what to do with this.
- System devices: Intel® Management Engine Interface.
For this one and the next one I installed the Intel Driver Update Utility. However, the utility says all my drivers are up to date.
- System devices: Intel® 6 Series/C200 Series Chipset Family SMBus Controller - 1C22
- Image devices: HP Deskjet 1510 series (USB).
This is my printer/scanner. For this one and the next I installed the last driver from HP, but the installer still complains.
- Universal series bus controller: HP Deskjet 1510 series(REST).
It's funny that this is listed as a USB controller. Might be related to the problem?
The suggestion was to continue the installation anyway. Did so:
- First attempt: The screen went blank for several hours. I assumed something had gone wrong and switched off the power. However, the install repair did go ahead. When I looked for Windows updates, it searched for several hours with no results. I assumed the problem had been my hard switch off, so I decided to restart the repair install from scratch.
- Second attempt: Again, the screen went blank for several hours several times. However, this time I only touched the machine when the power button light went orange, suggesting that it had entered hibernation. When that happened, I just turned the computer on and waited. Eventually the repair install finished.
Unfortunately, the PC is working even worse after the install repair:
- [PARTIALLY FIXED] The internet connection fails every ten minutes. Looks like this is caused by uTorrent. For the time being I just stopped using uTorrent, but I hope I find a way to fix it permanently.
- [FIXED] Problems with Windows Update: I activated Windows and started Windows Update.
- First attempt: It took an unbelievable 20 hours for the search to complete. This time I was patient, though. The search found 195 important updates and I scheduled all to be installed. This took a few hours, of course. Almost all installed successfully, but a few didn’t complete.
- Second and third attempts: I ran Windows Update again with all the remaining important updates selected, but two times in a row the update returned error code 8024402C, saying it couldn’t install 5 updates.
- Fourth attempt: Wondering if the problem might be related to the internet connection failures. Closed uTorrent in case that’s what is making the internet connection fail. Looks like it was, for this time the installation is correct.
- [FIXED] Manictime has stopped working. The icon is still in the tray bar, but every time it tries to display the reminder to tag away time it crashes (though the tray bar icon stays after the crashes).
- The problem was that the .NET framework was corrupted. Download the Microsoft .NET Framework Repair Tool and it fixed it.
- [PARTIALLY FIXED] The computer is as slow as before, if not more.
- After I completed the Windows Updates, the computer started to work properly again. The CPU usage seems still too high, though.
- [FIXED] At some point after several hours of usage, the internet connection stops working altogether. Disconnecting and reconnecting doesn’t work, neither does restarting the router.
I tried reinstalling the driver. It worked.
- Many times when I restart the computer the screen goes blank. I switch it off using the power button and then start it again. After one or two attempts the screen works again. Used the Intel Driver Update Utility and it didn’t find any updates to my current drivers. Checked the support section in the Dell website, but it says all my drivers are up to date. Still, I downloaded and installed the Intel Chipset Software Installation Utility. Still no luck.
- After my last restart Windows displayed a warning message:
Windows se recuperó de un cierre inesperado
Firma con problemas:
Nombre del evento de problema: BlueScreen
Versión del sistema operativo: 6.1.7601.2.1.0.768.3
Id. de configuración regional: 2057
Información adicional del problema:
OS Version: 6_1_7601
Service Pack: 1_0
Archivos que ayudan a describir el problema:
It offers to look for a solution online, but the only actual option available is “Check later”. I checked that one and the message closed.
Late October - Asked my insurance company technical support
They installed Superantispyware, Malwarebytes AntiMalware and Advanced System Care. Scanned the PC with all of them. MBAM and SASW found a lot of tracking cookies. I think they also found other suspicious files, including several trojans, although none seemed to be actually running. However, I can’t remember exactly what they found, and it looks like the logs have disappeared, maybe since I did the install repair. The problems remain.
4 November – Running antimalware software
Complete antivirus scan with Panda: Nothing significant found (just something in the Recycle bin).
Ran Advanced System Care full system optimization. Everything ran fine, but it informs me that IE and Java are not updated. The update of Java was straightforward, but updating IE was very troublesome.
5 November – Updating IE
I have IE 9 and the last version is IE 11. I download the last version, but the installation fails. The support page suggests uninstalling IE 9 before installing IE 11. I do so. Still doesn’t work.
I try the installation from Windows Update. It doesn’t work, error code 9C59. I google that error code and find a Microsoft forum thread with possible solutions:
- Updating the Windows Update service. Instructions: support.microsoft.com/en-gb/kb/949104. Doesn’t work.
- Installing a 'platform update' for Windows 7 that can resolve the 9C59 error: support.microsoft.com/kb/2670838. IT WORKS!
Can you help me with these? Thank you in advance.
Edited by Alonshow, 07 November 2016 - 10:32 AM.