I can't install antivirus avast because the registry has too many temporary files and virus and spyware or malicious software. How can I fix it, manually or software?

Computer is a 12, xps dell dimension 8800.Tried using disk cleanup and Defrag on the computer, but it could not remove a large number of temporary files. Still can not re - install the avast antivirus that was installed previously, done updates also.

I suggest before you do anything. Type MSCONFIG in run in the start menu. Click the Startup tab, and then tap off everything. Restart the computer.

You can clean your temporary files and other unnecessary files with CCleaner.
http://www.Piriform.com/ccleaner/download

If request you something to keep on the first run saved passwords from your browser then press no. On the first screen, click on run cleaner on the bottom right.

If you believe in the detectability of Avast, you can try to install again. Or you can download and install the virus Kaspersky 2011 removal tool.

http://www.Kaspersky.com/antivirus-removal-tool?form=1

And spyware, you can install Spybot Search and destroy.

http://www.safer-networking.org/en/mirrors/index.html

Note: Make sure that you run the update of the tools.

Note #2: Virus removal tool is only intended to get rid of the virus. It is not supposed to be used as an anti-virus official.

Tags: Windows

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