<http://www.theregister.com/2006/08/24/intel_centrino_update_glitch/>

Security researchers have identified performance problems with a
recent wireless driver security update from Intel. Vulnerabilities in
Centrino device drivers for Windows and Intel's PROSet management
software prompted a security update three weeks ago.

The initial update weighed in at more than 100MB, though Intel did
produce a slimmed-down update

(http://www.f-secure.com/weblog/archi....html#00000947)
soon after. The current driver release for the 2915ABG/2200BG
wireless cards is 9.0.4.17.

Unfortunately, software installed (S24EvMON.exe) with this Wi-Fi
driver is leaky, consuming considerable CPU and memory resources and
thereby hitting on the performance of PCs with the software
installed, researchers at net security firm F-Secure have discovered

(http://www.f-secure.com/weblog/archi...html#00000954).

The firm used Process Explorer from Sysinternals to identify the
source of performance problems it began to notice. Intel is aware of
the issue and is working on a revised fix.

Although the performance hit is undesirable, leaving systems
unpatched is even more of a problem. The SANS Institute has put
together an advisory (http://isc.sans.org/diary.php?date=2006-08-24),
more suited to sys admins and the technically knowledgeable, which
outlines performance loss mitigation strategies.

--
Best regards, FAQ for Wireless Internet: <http://Wireless.wikia.com>
John Navas FAQ for Wi-Fi: <http://wireless.wikia.com/wiki/Wi-Fi>
Wi-Fi How To: <http://wireless.wikia.com/wiki/Wi-Fi_HowTo>
Fixes to Wi-Fi Problems: <http://wireless.wikia.com/wiki/Wi-Fi_Fixes>