IE7 keeps crashing

My IE7 crashes or closes down with no warning when I try to close tabs. The
last time this happened I noticed, in event viewer, 32 identical instances of
the following:-

Event Type: Error
Event Source:
Event Category: None
Event ID: 0
Date: 25/01/2009
Time: 14:32:36
User: N/A
Computer: LEE

Description:
The description for Event ID ( 0 ) in Source ( ) cannot be found. The
local computer may not have the necessary registry information or message DLL
files to display messages from a remote computer. You may be able to use the
/AUXSOURCE= flag to retrieve this description; see Help and Support for
details. The following information is part of the event: 1.

Data:
0000: 3f 3f d1 2a cb e0 92 2d ??Ñ*ËÃ*Â’-
0008: 8e 38 d9 22 88 9a f7 c5 Ž8Ù"ˆš÷Å
0010: 2f 2f c1 3a f3 f1 82 3d //�:óñ‚=
0018: cd 0d 48 4e f8 f9 8a 35 �.HNøùŠ5
0020: 3e 1a 62 13 c3 31 0d 0c .b.Ã1..
0028: 2a bc e3 33 ed cb ea 85 *¼ã3Ã*Ëê…
0030: 6a 52 7e 1a d3 d1 a2 1d jR~.ÓÑ¢.
0038: 22 5d 76 ab dc d9 ab 15 "]v«ÜÙ«.
0040: 7f f9 6e 95 c7 fc 4d d4 ùn•ÇüMÔ
0048: 76 77 99 62 9a ab 8a e5 vw™bš«Šå
0050: 6e 6f 81 7a d7 ec 5d c4 no�z×ì]Ä
0058: 61 67 88 72 ba b9 ca 75 agˆrº¹Êu

I would appreciate a concise explanation and solution if possible.

Thank you in advance

Lee