1. What is your OS, 32 or 64-bit?
2. What version of Avast did you install?
3. What product of Avast did you install? Free, Pro, AIS?
4. What other security software do you currently have or did you have in the past on this machine including:
- Antivirus (AV)
- Firewall (FW). What is your Firewall?
- Trial versions of AV, FW and other security programs
- Other security software
- If they were in the past, how did you remove them (the vendor's uninstaller's tool or another way)?
5. Did the problem just start or have you had this a while? Did this happen after upgrading to a different version of Avast or installing a software or something else?
You can try an Avast Repair:
XP Users:
- Go to Control Panel > Add/Remove programs > Avast Antivirus.
- Scroll down and choose Repair function in the pop-up window.
- Reboot.
Vista & Win7 Users:
- Control Panel
- Programs & Features
- Uninstall a Program > Select Avast Antivirus
- Click the Change/Remove button and scroll down to Repair
- Click Next and follow.
- Reboot.
But please answer the questions above so we can help you better. Thank you.