Ok the box is running Win 7 premium 64 bit.

Its been getting loads of
"Microsoft Product: Windows Operating System; Version: 6.1.7600.16385; Event ID: 57; Event Source: Ntfs; warnings."

If I do a chkdsk it resolves it for a few days.

Time for a new hard drive?

This any use?

http://support.microsoft.com/kb/885688

What's NTFS?

Thanks but sadly that's XP only.

Spinrite (from GRC.com) solves a lot of such problems.

Its level 2 scan will recover many drives, I've managed to recover failing drives from a dozen machines already. It is worth its weight in dead hard drives.

cheers Dave I'll give it a try.

What's the SMART data say?

sorry not sure what you mean?

http://en.wikipedia.org/wiki/S.M.A.R.T.

There's various ways to read the data such as Speedfan, HD tune or CrystalDiskInfo.

OK I've set crystal info running How long should it run for to get meaning full information?
----------------------------------------------------------------------------
CrystalDiskInfo 5.0.0 (C) 2008-2012 hiyohiyo
Crystal Dew World : http://crystalmark.info/
----------------------------------------------------------------------------

OS : Windows 7 Ultimate Edition SP1 [6.1 Build 7601] (x64)
Date : 2012/06/26 16:20:32

-- Controller Map ----------------------------------------------------------
+ ATA Channel 0 (0) [ATA]
- SONY DVD-ROM DDU1615 ATA Device
+ ATA Channel 1 (1) [ATA]
- PIONEER DVD-RW DVR-112 ATA Device
- ATA Channel 0 (0) [ATA]
+ Standard Dual Channel PCI IDE Controller [ATA]
- ATA Channel 0 (0)
- ATA Channel 1 (1)
+ Standard AHCI 1.0 Serial ATA Controller [ATA]
- ATA Channel 0 (0)
- NVIDIA nForce Serial ATA Controller [SCSI]
+ NVIDIA nForce Serial ATA Controller [SCSI]
- SAMSUNG SP2504C SCSI Disk Device

-- Disk List ---------------------------------------------------------------
(1) SAMSUNG SP2504C : 250.0 GB [0/2/0, sm]
(2) WDC WD20EARS-00MVWB0 : 2000.3 GB [1/X/X, sa1] (V=1058, P=1021)

----------------------------------------------------------------------------
(1) SAMSUNG SP2504C
----------------------------------------------------------------------------
Model : SAMSUNG SP2504C
Firmware : VT100-52
Serial Number : S0WRJ1NP501301
Disk Size : 250.0 GB (8.4/137.4/250.0)
Buffer Size : 8192 KB
Queue Depth : 32
# of Sectors : 488281250
Rotation Rate : Unknown
Interface : Serial ATA
Major Version : ATA/ATAPI-7
Minor Version : ATA/ATAPI-7 T13 1532D version 4a
Transfer Mode : SATA/300
Power On Hours : 12026 hours
Power On Count : 4688 count
Temparature : 29 C (84 F)
Health Status : Good
Features : S.M.A.R.T., AAM, 48bit LBA, NCQ
APM Level : ----
AAM Level : FE80h [ON]

-- S.M.A.R.T. --------------------------------------------------------------
ID Cur Wor Thr RawValues(6) Attribute Name
01 100 100 _51 00000000000B Read Error Rate
03 253 253 _25 000000001700 Spin-Up Time
04 _91 _91 __0 00000000242C Start/Stop Count
05 253 253 _10 000000000000 Reallocated Sectors Count
07 253 253 __0 000000000000 Seek Error Rate
08 253 253 __0 000000000000 Seek Time Performance
09 100 100 __0 000000002EFA Power-On Hours
0A 253 253 __0 000000000000 Spin Retry Count
0B 253 253 __0 000000000000 Recalibration Retries
0C _96 _96 __0 000000001250 Power Cycle Count
BB 253 253 __0 000000000000 Reported Uncorrectable Errors
BE 151 130 __0 00000000001D Airflow Temperature
C2 151 130 __0 00000000001D Temperature
C3 100 100 __0 0000016EF240 Hardware ECC recovered
C4 253 253 __0 000000000000 Reallocation Event Count
C5 253 253 __0 000000000000 Current Pending Sector Count
C6 253 253 __0 000000000000 Uncorrectable Sector Count
C7 200 200 __0 000000000000 UltraDMA CRC Error Count
C8 100 100 __0 000000000000 Write Error Rate
C9 100 100 __0 000000000000 Soft Read Error Rate
CA 253 253 __0 000000000000 Data Address Mark Error