If trying to delete a specific domain in the plesk control panel and getting folllowing error"
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"Error: Unable to remove domains: Problems occured while removing domains: Unable to remove hosting:
Unable to remove FTP subaccount: Unable to delete system user imccadmin: SysUser->systemRemove() failed:
usermng failed: Unable to get the object (C:\pagefile.sys) security info: (32) The process cannot access the file because it is being used by another process.."
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Then there are two ways to delete domain if the domain is not removing from plesk.
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1.you have to tried to delete specific domain from my sql
under PSA database .
2.Run the following commands in command prompt:

cd %plesk_bin%
mchk --all --fix=all
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And then try to delete the domain from plesk .

That's all

Best Regards,
Chetan Sonar