Shared folder access rights on Win SMB2010

I have number of shared folders on the SMB 2010 server.
Occasionally, a user is unable to either access the folder or save to the folder.  When I go into the folder properties/security and check the user's effective rights, it shows the user has all the required rights.

The user's rights are defined via memebership in a security group and the security group rights are defined at the top folder cascading to the folders within it.

Is there a way to clean/reset the access rights table or further debug this problem?
ivolachAsked:
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Jason JohanknechtConnect With a Mentor IT ManagerCommented:
Also make sure your RAID controller write cache battery is reported.  One clue is write cache is turned off and read 100% read cache is a clue (Unless you by choice turned it off).
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Jason JohanknechtIT ManagerCommented:
What antivirus/Firewall software are you running on server and trouble workstations?
What OS on workstations?
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ivolachAuthor Commented:
Sorry for the long delay..
Running TrendMicro on both the server and the workstation.
Workstation OS Win7 & Win8.1 (both pro)
I had to reset all the access rights on all folders to resolve
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Jason JohanknechtIT ManagerCommented:
I would try to test hard drives on server first.  What make model server and RAID controller (RAID level also)?
Some servers just have predictive failure, and may not be flagged yet even if causing this issue.

What version of Trend Micro?
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ivolachAuthor Commented:
If it happens again I'll test hard drives.
It is an HP Proliant 350 with Raid 5.
TrendMicro the latest version.
Since I have reset the ACL I have not experienced the problem yet.  It seems to crop up every few months.
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