Suddenly laptop shutdown (windows 8.1)

[newbees]

My laptop every now and then will Suddenly laptop shutdown. I re-on the laptop immediately after it shuts off, the loading will take longer then usual, and the laptop will be slow and laggy for a few minutes. (the laptop do not feel hot, so i don't think it shut down due to laptop overheating.)

There no errors shown on screen before and after the shut down.

i did run virus scan but found nothing. (using 360 Internet Security.)
i do keep my drivers updated.
so what is the problem that causes it to randomly shut off ?

 

[snowctrl]

Make sure you have all your critical data backed up, and run a Check Disk or similar - but my suggestion is that your hard drive is on the way out - prepare to upgrade to an SSD!!!

 

[newbees]

i have ran check disk on both of my hard drives, only one of them have an error and its fixed.

Chkdsk was executed in scan mode on a volume snapshot.

Checking file system on C:
Volume label is OS.

Stage 1: Examining basic file system structure ...

373760 file records processed. File verification completed.

6160 large file records processed.
0 bad file records processed.
Stage 2: Examining file name linkage ...

474294 index entries processed. Index verification completed.
Found missing Index entry for file "\ProgramData\Microsoft\Windows\WER\ReportQueue\NonCritical_IPX Assertion_d4c76cfcf567ba4d2612a3eb3b6bb0345d4d3494_00000000_cab_0597dde9\Report.wer <0x6e,0x1f091>" from index "\??\C:\found.000" of directory "$I30"
... repaired online.

Stage 3: Examining security descriptors ...
Security descriptor verification completed.

50268 data files processed. CHKDSK is verifying Usn Journal...
Usn Journal verification completed.
Windows has found problems and they were all fixed online.
No further action is required.

 

[snowctrl]

Any warranty?

 

[newbees]

yep it is still under warranty, i sent it back a few weeks ago due to over heating.

 

[snowctrl]

yep it is still under warranty, i sent it back a few weeks ago due to over heating.

Time to send it back again then...