Desktop Keeps Auto-Refreshing

I've recently started having an issue whereby my desktop icons (and by extension the icons in the start bar) keep refreshing. It's not a constant thing - usually several minutes pass between refreshes - and I'm not entirely sure what's triggering it or why it keeps on happening, still less how to go about fixing it.

A scheduled system scan for viruses last night came up negative, so did a quick scan I ran this evening. On the advice of a user in another thread about the same issue, I've also downloaded Malwarebytes and ran a full scan using that. The results are as follows:

Malwarebytes' Anti-Malware 1.51.1.1800
Malwarebytes : Free anti-malware, anti-virus and spyware removal download

Database version: 7342

Windows 6.1.7601 Service Pack 1
Internet Explorer 9.0.8112.16421

01/08/2011 05:19:43
mbam-log-2011-08-01 (05-19-43).txt

Scan type: Full scan (C:\|D:\|)
Objects scanned: 380176
Time elapsed: 59 minute(s), 58 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 0
Registry Data Items Infected: 0
Folders Infected: 0
Files Infected: 0

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
(No malicious items detected)

Registry Values Infected:
(No malicious items detected)

Registry Data Items Infected:
(No malicious items detected)

Folders Infected:
(No malicious items detected)

Files Infected:
(No malicious items detected)

A quick scan flagged up no irregularities, and a Windows Defender scan run two or three days previous also detected nothing. Is there anything that can be done to stop the desktop refreshing? It's really annoying and a little worrying, and any help to solve the issue would be gratefully appreciated.

Hi,

Can you give us a little bit more detail about what you mean by "re-freshing"? For example:

1. Do the icon positions change?
2. Does your background change etc. etc.

Regards,
Golden