after following many similar topics in this forum and elsewhere to no avail for three days, decided to start a new topic.
Here is the story:
a friend of mine asked me to clean his PC from malware/viruses.
I installed free AVIRA antivirus 2014, searched for viruses, deleted bunch of them. Additionally I ran CCleaner, deleted a bunch of other error files, etc. I did not backup anything.
After restarting, I (and apparently many other users) have a problem - black screen and moving cursor.
PC - Acer ZC3, Ferrari 5000 series
OS - Windows 7 (in Russian), I am not sure if it is 32 or 64 bit.
EDIT: running a command "wmic os get OSarchitecture" in CMD shows my system is 32-bit (thanks to http://superuser.com/questions/321988/how-do-i-determine-if-my-windows-is-32-bit-or-64-bit-using-a-command).
Computer boots normally, I enter password for Win7, then it goes to completely black screen, only mouse cursor visible. I can move the cursor, but left/right buttons are inoperable. Pressing Ctrl+Alt+Delete leads to a MENU where you can choose to LOCK PC, CHANGE PASSWORD, RUN TASK MANAGER, TURN PC OFF. However, TASK MANAGER does not work.
Safe mode leads to the same result - black screen, except for "SAFE MODE" message on the 4 corners and MICROSOFT ® WINDOWS ® (BUILD 7601:Service Pack 1 message on top center.
Unfortunately, i dont have a repair disk. But pressing F8 after BIOS I can access ADVANCED BOOT OPTIONS. Choosing 1st option (REPAIR YOUR COMPUTER) leads me to SYSTEM RESTORE menu with 5 options. Pressing 1st option starts scanning PC for errors, reports 'no errors found'. 2nd option says 'no restore points found'. 3rd option says 'no system image found'. 4th option scans PC memory, finds no errors. 5th option is more interesting - command line.
From there I learned, e.g. windows drive is on d: (and not on c:), I can see my friend's files are alive. DIR C: command says "drive C is reserved by the system".
Running SFC /SCANNOW does not really scan but instantly says that I need to restart the system to restore files. Restarting and repeating SFC /SCANNOW leads to the same loop.
I tried to provide all the details, but if there is anything missing I am more than glad to reply.
Waiting your help.
Edited by wertamaki, 29 August 2014 - 03:52 AM.