try this
Background
Spybot 1.4 worked great for me for a long time untill suddenly I had the below mentioned problems and then Spybot was simply unusable. Nothing in all previous posts would fix this. Other registry scanning programs such as adaware and misc registry cleaners would have the same problems.
Problem
spybot will not complete a scan.
spybot becomes unresponsive and freezes at different points of scan.
system internals freezes during scan.
Solution
1. you will need to download two programs
AVG 7.5 Antispyware (used to be ewido) which is here->
http://www.grisoft.com/doc/31/us/crp/0?prd=asw
and Blacklight Rootkit revealer which is here ->
http://www.f-secure.com/blacklight/try_blacklight.html
2. a)install and start the avg7.5 antispyware
avg7.5 antispyware will not fix this problem but will simply detect the rootkit in memory before the fix and confirm that the problem is no longer there after the fix. you can keep or uninstall this program when finished.
b) hit the update button and then update by pressing start update..it is pretty much self explanatory
and simply to get most recent definitions of course.
c) then you can hit the scanner button and only need do the memory scan. when the memory scan is complete ( only takes a few minutes or so) there should be a few detections if this your problem.
d)exit avg7.5 antispyware
3. a) run the blacklight rootkit program and get to the scan screen and run a scan. This scan should not take very long as well, maybe 5-10 minutes max. this program will detect the files that are causing the memory problem. in my case it detected one file called csrvu.exe and was located in windows/system32 folder. anyways..click rename and finish and blacklight will rename the file with a different ending.. through explorer find this file and delete it
4. restart computer and run the avg7.5 antispyware memory scan again. there should be no detections and this will indicate fixed.
Spybot and the above mentioned programs now run as they should for the first time in months..I hope this fixes your problem too.