My win 7 freezes then self restarts

hi :)
first check i advise is below



Perform a SFC Scan (System File Check)

1. Click Start, click All Programs, click Accessories, right-click Command Prompt, and then click Run as administrator. If you are prompted for an administrator password or for a confirmation, type the password, or click Allow

2. Type the following command, sfc /scannow and then press ENTER:

(A message will appear stating that 'The system scan will begin'. Be patient because the scan may take some time)

3. If any files require a replace SFC will replace them. You may be asked to insert your Windows 7 DVD for this process to continue

4. If everything is okay you should, after the scan, see the following message "Windows resource protection did not find any integrity violations"

5. After the scan has completed, close the command prompt window, restart the computer. (TIP repeat scan 3 times)


How to use the System File Checker tool to troubleshoot missing or corrupted system files on Windows Vista or on Windows 7 >>>How to use the System File Checker tool to troubleshoot missing or corrupted system files on Windows Vista or on Windows 7

Parameters

/scannow : Scans all protected system files immediately.
/scanonce : Scans all protected system files once.
/scanboot : Scans all protected system files every time the computer is restarted.
/revert : Returns the scan to its default operation.
/purgecache : Purges the Windows File Protection file cache and scans all protected system files immediately.
/cachesize=x : Sets the size, in MB, of the Windows File Protection file cache.
/? : Displays help at the command prompt.

If a Windows Resource Protection (WRP) file is missing or is corrupted, Windows may not behave as expected. For example, some Windows functions may not work, or Windows may crash. The System File Checker tool (SFC.exe) scans for missing or corrupted system files and repairs them.

hi there did you try this? How to use the System File Checker tool to troubleshoot missing or corrupted system files on Windows Vista or on Windows 7

If the System File Checker tool cannot repair a file, follow these steps:

At an elevated command prompt, type the following command, and then press ENTER:
takeown /f Path_And_File_Name
For example, type takeown /f E:\windows\system32\jscript.dll.

Type the following command, and then press ENTER to grant administrators full access to the file:
icacls Path_And_File_Name /GRANT ADMINISTRATORS:F
For example, type icacls E:\windows\system32\jscript.dll /grant administrators:F.

Type the following command to replace the file with a known good copy of the file:
Copy Path_And_File_Name_Of_Source_File Path_And_File_Name_Of_Destination
For example, type copy E:\temp\jscript.dll E:\windows\system32\jscript.dll.

can you post the cbs log in a zip file and i will have a look for you. i may be slow at posting today as i am busy repairing a pc :)

if your pc is very unstable after running the file repair here is another option to consider its one of brinks tutorials

How to Do a Repair Install to Fix Windows 7 please read his advice >>> Repair Install

How to Extract Files from the Windows 7 Installation DVD >>> Extract Files from Windows 7 Installation DVD

hi there:)
have you checked the power settings have a look at brinks tutorial How to Change the Power Plan Settings in Windows 7
Power Plan Settings - Change

and also this one Power Plan - Select