I use Windows 7 and have problems with svchost processes for some time. They reach 100% at the system start or when connect/disconnect to internet and occupy the processor for one hour or so. They also reach max at some times during work.
I made a mistake and used some advices found in this thread:
because I thought it's the same problem. I used TDSSKiller, ESET Online Scanner, CCleaner and maybe something else.
Later on I sought help on different forum and used OTL, RSIT, MBAM, AdwCleaner, USBFix. I was told to remove Microsoft Security Essentials.
Unfortunately no one could help me.
I was also trying to install Service Pack 1 for Windows 7 using Windows Update and by downloading the installation file. In both cases after reaching 70% of installation progress there was an installation failure, reverting changes and ERROR_INSTAL_FAILURE(0x80070643) message.
Does anyone can help?