I get a problem on one of my computers where Internet Explorer 7 crashes often due to sdhelper.dll

It seems to only happen when opening tabs etc, and it doesn't just happen randomly when viewing a web page.

I have tried re-installing spybot (after cleaning up after the uninstall with Revo uninstaller) but the problem remains.


I don't have this problem on other computers, both of which run Windows XP and IE7 (although have SP3 rather than SP2)

The error log is as follows:


Code:
Event Type:	Error
Event Source:	Application Error
Event Category:	None
Event ID:	1000
Date:		12/04/2011
Time:		10:15:18 a.m.
User:		N/A
Computer:	AMD2800
Description:
Faulting application iexplore.exe, version 7.0.6000.17055, faulting module sdhelper.dll, version 1.6.2.14, fault address 0x000051a0.

For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
Data:
0000: 41 70 70 6c 69 63 61 74   Applicat
0008: 69 6f 6e 20 46 61 69 6c   ion Fail
0010: 75 72 65 20 20 69 65 78   ure  iex
0018: 70 6c 6f 72 65 2e 65 78   plore.ex
0020: 65 20 37 2e 30 2e 36 30   e 7.0.60
0028: 30 30 2e 31 37 30 35 35   00.17055
0030: 20 69 6e 20 73 64 68 65    in sdhe
0038: 6c 70 65 72 2e 64 6c 6c   lper.dll
0040: 20 31 2e 36 2e 32 2e 31    1.6.2.1
0048: 34 20 61 74 20 6f 66 66   4 at off
0050: 73 65 74 20 30 30 30 30   set 0000
0058: 35 31 61 30 0d 0a         51a0..