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Uninstall avast: avast! Uninstall Utility | Download aswClear for avast! Removal

Install MSE: Microsoft Security Essentials - Microsoft Windows

Make a full scan

Reduce items at start up:
1. Startup Programs - Change
2. Troubleshoot Application Conflicts by Performing a Clean Startup

Run the System File Checker.

• 1. Click on the
  2. Type CMD on Search
  3. Left click and Run as Administrator
  4. Type SFC /scannow

Full tutorial here:

• SFC /SCANNOW Command - System File Checker

Run Disk Check on your hard disk for file system errors and bad sectors on it:

• Disk Check

Go to this link : Intel® Driver Update Utility check the system for latest updates. Download and install them.

If this does not provide more stability, test the RAM sticks, in the following manner:

Take memtest. Run for 8 passes and test each stick in a know good slot for an additional 6 passes

• RAM - Test with Memtest86+

The goal is to test all the RAM sticks and all the motherboard slots

Check your motherboard manual to ensure the RAM sticks are in the recommended motherboard slots. Some motherboards have very specific slots required for the number of RAM sticks installed

If you get errors, stop the test and continue with the next step

1. Remove all but one stick of RAM from your computer (this will be RAM stick #1), and run Memtest86 again, for 7 passes.

*Be sure to note the RAM stick, use a piece of tape with a number, and note the motherboard slot

If this stick passes the test then go to step #3

2. If RAM stick #1 has errors, repeat the test with RAM stick #2 in the same motherboard slot.

*If RAM stick #2 passes, this indicates that RAM stick #1 may be bad. If you want to be absolutely sure, re-test RAM stick #1 in another known good slot

*If RAM stick #2 has errors, this indicates another possible bad RAM stick, a possible motherboard slot failure or inadequate settings

3. Test the next stick of RAM (stick #2) in the next motherboard slot

*If this RAM stick has errors repeat step #2 using a known good stick if possible, or another stick

*If this RAM stick has no errors and both sticks failed in slot#1, test RAM stick #1 in this slot

4. If you find a stick that passes the test, test it in all the other motherboard slots

If Part 2 testing shows errors, and all tests in Part 3 show errors, you will need to test the RAM sticks in another computer and/or test other RAM in your computer to identify the problem

In this way, you can identify whether it is a bad stick of RAM, a bad motherboard, or incompatibility between the sticks

Errors are sometimes found after 8 passes
Do this test overnight, before going to bed

Post back results