BSOD when trying to sleep

Hello hyc.

System Optimisers
Please remove the following software:

Code:

TuneUpUtilitiesDriver32.sys   Fri May 25 16:28:25 2012 (4FBF5EC9)

This software is a known cause of BSOD's. The windows 7 operating system does not require these registry cleaning software. They often tune-down rather than tune-up and can wreck the OS beyond repair. Microsoft have improved Windows 7 significantly and it is much better at organising and optimising itself than its predecessors. Check this, this and this thread for evidence.

If you feel the need to use a registry cleaning or optimisation software, most of us recommend the use of CCleaner - PC Optimization and Cleaning - Free Download but make sure you back up the registry before making letting ccleaner delete anything.

10 Tips on How to Properly Maintain Your Computer

Security App
Crashes indicate Kaspersky being a possible cause. Remove Kaspersky and replace with Microsoft Security Essentials to see if it provides more stability. Uninstallers (removal tools) for common antivirus software

Microsoft Security Essentials and Malwarebytes are recommended from a strict BSOD perspective. They do not cause blue screens on the system as other AV products do.

Microsoft Security Essentials, Free antivirus for windows

Malwarebytes Anti-Malware Free

   Warning

DO NOT start the free trial of MalwareBytes, unselect that option when prompted.

   Tip

Update them and make full scans with both separately.

Update these REALTEK drivers:
Driver Reference Table - RTKVHDA.sys
Driver Reference Table - Rt86win7.sys

Code:

RTKVHDA.sys                   Tue Feb 15 15:32:33 2011 (4D5A4831)
Rt86win7.sys                  Mon Mar 21 19:19:42 2011 (4D87506E)

Basic checks:
Please run these tests and report back the results

1. SFC /scannow to check windows for corruption - SFC /SCANNOW Command - System File Checker
2. Disk check for errors on the hard drive - How to Run Disk Check in Windows 7
3. Troubleshoot applications by a clean boot - Troubleshoot Application Conflicts by Performing a Clean Startup
4. Memtest86+ paying close attention to part 3 - RAM - Test with Memtest86+
5. Hard drive test from HDD mfg website - Hard Drive Diagnostic Procedure