You'll most likely need to back up any data you don't want to lose, then restore to factory settings in accordance with your user guide. However here're some things you can try first if you wish.
Get your antivirus program up to date and boot into Safe Mode. Note that some viruses can hide themselves from your antivirus program in normal mode, so you really need to scan in Safe Mode. To get into Safe Mode when you first power up, hit F8 about once a second until you get the menu and select Safe Mode. Then run a full system scan.
Microsoft has suggestions and offerings at
MS forum moderator Keith has some suggestions along this line at
If that fixes it, fine. If not, use System Restore to go back to a date prior to the beginning of the problem. To run System Restore, click Start -> Programs -> Accessories -> System Tools -> System Restore. Click the box that says Show more restore points.
You can check for corrupted system files. Open an administrator command prompt and run SFC if the above doesn't help. Click START, then type CMD in the search box, right-click CMD.EXE and click Run as administrator. Then from the command prompt type sfc /scannow.
Finally if all else fails, you can check the rather cryptic system event log. To do that click Start -> Control Panel -> Administrative Tools -> Event Viewer. Once in Event Viewer click on the system log and scroll through the entries looking for those flagged "error" to see if you can find hints as to where the problem could be.
When you get your system back in good working order, I urge you to back your system up to an external hard drive and make regular periodic updates to it.
I hope this helps. Good luck.
I have windows 7 ultimate recently installed on my system,by mistake i opened a pen drive in it without scaning which had a few trojans and viruses.Afterwards when i tried to remove them only a few were removed,since then then my computer automatically types asterik(*)even when booting and also the cursor shifts mostly to left whenever i type anywhere..i 've tried changing mouse options..no help.
Also i used that Pen drive in another system with XP in which also typing problem such as pressing a button once make it type repeatedly was there but now keys such as ctrl alt delete don't work and i am not able to open it as it is locked whenever it starts(by default it was like this)...pls help