Windows 7: HELP windows 7 files corrupted how to fix

This is my antivirus report



05/05/2012 13:21
Scan of all local drives

File C:\Users\Ace Pieda\AppData\Roaming\Mozilla\Firefox\Profiles\tfsknu0g.default\CT2786678\Dialogs.zip|>Dialogs\Defua ltImages\icon.png Error 42125 {ZIP archive is corrupted.}
File C:\Windows\Installer\7317f5.msp|>PCW_CAB_Silver|>systemxmlDLL Error 42127 {CAB archive is corrupted.}
File C:\Windows\Installer\7317f5.msp|>oldTocurrent\01_StringPool Error 42144 {OLE archive is corrupted.}
File C:\Windows\Installer\7317f5.msp|>oldTocurrent\01_StringData Error 42144 {OLE archive is corrupted.}
File C:\Windows\Installer\7317f5.msp|>oldTocurrent\01MsiAssemblyName Error 42144 {OLE archive is corrupted.}
File C:\Windows\Installer\7317f5.msp|>oldTocurrent\01CustomAction Error 42144 {OLE archive is corrupted.}
File C:\Windows\Installer\7317f5.msp|>oldTocurrent\01MsiAssembly Error 42144 {OLE archive is corrupted.}
Number of searched folders: 26201
Number of tested files: 569489
Number of infected files: 0
Pls. help my computer is very lag

Hello Crimson, and welcome to Sevenforums!

First, what antivirus are you using?

Second, let this scanner run on your computer to search for infected files: Microsoft Safety Scanner - Antivirus | Remove Spyware, Malware, Viruses Free

See if this helps you with any firefox errors: How to Fix Mozilla Firefox | eHow.com

You are never supposed to run 2 or more antiviruses together on a single computer. Also, to remove any antivirus, you may need a special removal tool to make sure you get all the pieces. In addition to your antivirus, consider installing/updating/running (full scan) the free Malwarebytes software. Good thing to have and highly recommended by most people: http://download.cnet.com/Malwarebyte...=dl&tag=button

Finally, run this tool to fix system errors: SFC /SCANNOW Command - System File Checker - created by Brink

Work through these Troubleshooting Steps for Windows 7 especially to establish a clean boot, check System file integrity and clean/defrag your System.