Thread: Calibre locks entire machine for 1-2 mins on first startup
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Old 06-19-2015, 06:07 AM   #134
chaley
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Join Date: Jan 2010
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Quote:
Originally Posted by HarryT View Post
Many thanks for the idea, chaley, but unfortunately it has hasn't helped. It deleted 9.4GB of Windows Update files (you were right - running "Disk Cleanup" as administrator did make the option appear), but after having done so, I still got a 1 minute lock-up when Calibre started.
Did you reboot?

How many files are in the folder C:\Windows\System32\catroot\{F750E6C3-38EE-11D1-85E5-00C04FC295EE}?

One thing I noticed: I had to run the tool several times before it cleaned everything up. My guess is that it looks "1 deep" to determine whether an update is still required, so deleting an update can allow a second pass to delete more.

Have you tried the registry cleaner?
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