Win 7 Home Prem X64 BSOD

Usually if you restore the system and it still misbehaves - that's a good indicator of hardware problems.
Good luck!

That's always a possibility - especially if Linux isn't giving you any issues.
Run the hardware diagnostics and stress tests that I suggested. Those are most likely to generate repeatable results - and you can state that to the service center if you decide to send it in.

Finally got my Asus K52JK back from repair centre yesterday. Guess what, it froze shortly after logging into steam and downloading portal 2. This leads me to think it may not be the motherboard but the HDD, I am tempted to drive to Asus HQ UK and place my laptop "back into the source"!

C:

+ System - Provider [ Name] Microsoft-Windows-Wininit [ Guid] {206f6dea-d3c5-4d10-bc72-989f03c8b84b} [ EventSourceName] Wininit
- EventID 1001 [ Qualifiers] 16384
Version 0 Level 4 Task 0 Opcode 0 Keywords 0x80000000000000 - TimeCreated [ SystemTime] 2011-05-25T20:04:10.000000000Z
EventRecordID 1926 Correlation - Execution [ ProcessID] 0 [ ThreadID] 0
Channel Application Computer asus-PC Security
- EventData


Checking file system on C: The type of the file system is NTFS. Volume label is OS. A disk check has been scheduled. Windows will now check the disk. CHKDSK is verifying files (stage 1 of 5)... 218624 file records processed. File verification completed. 158 large file records processed. 0 bad file records processed. 0 EA records processed. 44 reparse records processed. CHKDSK is verifying indexes (stage 2 of 5)... 319116 index entries processed. Index verification completed. 0 unindexed files scanned. 0 unindexed files recovered. CHKDSK is verifying security descriptors (stage 3 of 5)... 218624 file SDs/SIDs processed. Cleaning up 210 unused index entries from index $SII of file 0x9. Cleaning up 210 unused index entries from index $SDH of file 0x9. Cleaning up 210 unused security descriptors. Security descriptor verification completed. 50247 data files processed. CHKDSK is verifying Usn Journal... 34783128 USN bytes processed. Usn Journal verification completed. CHKDSK is verifying file data (stage 4 of 5)... 218608 files processed. File data verification completed. CHKDSK is verifying free space (stage 5 of 5)... 23447325 free clusters processed. Free space verification is complete. CHKDSK discovered free space marked as allocated in the master file table (MFT) bitmap. CHKDSK discovered free space marked as allocated in the volume bitmap. Windows has made corrections to the file system. 122096639 KB total disk space. 27846828 KB in 167030 files. 137872 KB in 50248 indexes. 0 KB in bad sectors. 322635 KB in use by the system. 65536 KB occupied by the log file. 93789304 KB available on disk. 4096 bytes in each allocation unit. 30524159 total allocation units on disk. 23447326 allocation units available on disk. Internal Info: 00 56 03 00 ca 50 03 00 fe fd 06 00 00 00 00 00 .V...P.......... de 00 00 00 2c 00 00 00 00 00 00 00 00 00 00 00 ....,........... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ Windows has finished checking your disk. Please wait while your computer restarts.

Windows has made corrections to the file system.

Wait a couple of days and run CHKDSK /R /F again - if it has the above text in the summary, then it's likely to be a hard drive issue.

Also, try the free hardware diagnostics from my earlier post. With the repairs that Asus UK did, it may change the readings on your hard drive (you didn't have CHKDSK errors before sending it out - but you do now)