Hi derekdiong1 and welcome to the forum.
Prior to you installing Avast, did you uninstall McAfee with the McAfee uninstall tool? Using more than 2 AV's can cause all kinds of problems including false positives.
- This article provides the steps to remove McAfee from the Security Center from your computer:
http://ts.mcafeehelp.com/faq3.asp?docid=71525- Also for direct download:
http://download.mcafee.com/products/licensed/cust_support_patches/VSCleanupTool.exe and
http://download.mcafee.com/products/licensed/cust_support_patches/MCPR.exe (2007)
-
http://uninstallers.blogspot.com/I would try the uninstaller for McAfee again to make sure ALL remnants are gone, then
reboot.
If Avast is not working properly after this because McAfee may have corrupted things, try an Avast Repair:
- Go to Control Panel > Add/Remove programs > Avast Antivirus.
- Scroll down and choose Repair function in the pop-up window.
-
Reboot.
If this fails, you will need to uninstall Avast and do a
clean install of Avast:
1. Save a copy of newest version of Avast (5.0.677) for the version you need and save it to your HDD:
Free –
http://files.avast.com/iavs5x/setup_av_free_eng.exe - (English only)
Free –
http://files.avast.com/iavs5x/setup_av_free.exe - (multi-language version)
Pro –
http://www.avast.com/pro-antivirus#tab4AIS –
http://files.avast.com/iavs5x/setup_ais.exe2. Download the Avast Uninstall Utility, aswClear5.exe
http://www.avast.com/uninstall-utility and save it to your HDD (it has uninstall tools for both 4.0 and 5.0 if you used a prior version on this machine).
3. Disconnect from the Internet at this time.
4. Go to Control Panel and uninstall Avast through Add/Remove Programs if possible and reboot.
5. If Step 4 fails, boot into
Safe Mode (hit F8 repeatedly) and run the Avast Uninstall Tool.
Uninstall all versions of Avast you had on this machine at this time.6.
Reboot.
7. Install the newest version of Avast and
reboot.
8. Get Internet access and register your copy or add the license key for Free, Pro, or AIS.
Free –
http://www.avast.com/registration-free-antivirus.php9. Update the Avast definitions.
Next, run an
Avast Full scan. If any infections come up, put it in the Virus Chest. If you have a 32-bit machine, run a
Avast Boot-time scan. Report back on the results.
Also check your computer for malware with Malwarebytes’ Anti-Malware (
MBAM).
· Download
free http://www.malwarebytes.org/ (the blue button) for an on-demand scanner.
· Double Click mbam-setup.exe to install the application.
· After install, click
update so you have latest database before scanning.
· Under Settings:
o
General: Automatically Save File After Scan Completes is checked off
o
Scanner Settings:
Check all boxeso
Updater: Download and install update if available is checked off
· Once the program has loaded, select "Perform
FULL Scan", then click Scan.
· The scan may take some time to finish, so please be patient.
· When the disinfection scan is complete, a log will appear in Notepad and you may be prompted to Restart. (See Extra Note).
· Click the “
remove selected” button to quarantine anything found. You will find the infection details under the Quarantine tab.
· The log is automatically saved by MBAM and can be viewed by clicking the Logs tab in MBAM.
·
Copy & Paste the entire report in your next reply.
Please let me know if you have any questions. Thank you.