I’m not really sure this problem is caused by avast, i’ve test several computers and always got the same results.
Environment: Win7 64, avast free 6.01
Problem: When i try to copy a large pdf file to a usb storage media (not include usb harddisk, problem arise for cards and u disks), the copying progress bar would pause at some point and remains for a long time with a speed of zero (sometimes several minutes), actually the new copy is already created completely. When i disable avast shields, this phenomenon disappear. And this only happened for pdf file and usb storage.
Use “Process Monitor” i found that in such cases, the operation of the “IRP_MJ_CLEANUP” consume an unusually longer time.
Could anyone tell me how could such thing happened? Any advice will be appreciated.
So, I added “K:*.pdf” to the file system shield exclusion list for writing operations, with K: being the drive-letter assigned to usb-sticks.
This solves the problem, however the pdfs will not be scanned any more when writing on the stick.
Seems to be the only way for now. Fortunately this problem did not bring too much inconvenience.
I notice that the virus definition version 110401-2 solves another issue with pdf files, but this one remains. I hope this bug could be fixed in some day.
Possibly yes - though some other (unrelated) changes should appear in the scanning engine (i.e. the virus database update) in the next few days which should have positive effect even for older program versions.