Windows Vista forum: Cant download anything! "Application not found"

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.
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Microsoft has suggestions and offerings at
http://windows.microsoft.com/en-US/windows7/how-do-I-remove-a-computer-virus
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MS forum moderator Keith has some suggestions along this line at
http://answers.microsoft.com/en-us/windows/forum/windows_7-performance/windows-explorer-has-stopped-working/6ab02526-5071-4dcc-895f-d90202bad8b3
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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.
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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.
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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.
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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.
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I hope this helps. Good luck.

If the malware is completely removed already, there are occasions when the file associations for executable files still need to be repaired. The fix below should get it done:

Try the .exe fix first, then the .LNK fix if the .exe fix doesn't take care of the shortcuts on your desktop.
http://www.winhelponline.com/articles/105/1/File-association-fixes-for-Windows-Vista.html

Hope this helps.

Grif

Okay sorry, but i cannot run any of the websites you guys are asking me to go to. When i try to run the files your guys websites want me to it tells me that the application is not found..