Been using build 7000 about a month has been very functional until moving large amounts of files and multiple file selection. Seemed to start when transferring files from SD card but that's the same time I started using 7 to transfer and organize files inclusive of trying synctoy on 7.Heres what happens selecting copying and moving files works fine enabled toolbar-menu files,edit,edit.view,help when selecting more than about four files explorer freezes and mouse cursor freezes the problem is not consistant and does not happen all the time but about half the time.Thought the problem was card reader and still may be it reads fine but cannot write, says write protected on sd cards that are not with built in reader but works fine with external usb connected reader.Event viewer showed reg handle corruption on sd reader drive.Event viewer showed user profile corruptionCard reader worked fine read write under XP booted back to XP and now only reads doesn't make sense.Deleted user accountcreated new user accountExplorer now seems fine but have not moved many filesevent viewer still reads reg handle leaks on sd readerLog Name: Application Source: Microsoft-Windows-User Profiles Service Date: 3/15/2009 4:11:14 PM Event ID: 1530 Task Category: None Level: Warning Keywords: User: SYSTEM Computer: Bankslay-PC Description: Windows detected your registry file is still in use by other applications or services. The file will be unloaded now. The applications or services that hold your registry file may not function properly afterwards. DETAIL - 1 user registry handles leaked from \Registry\User\S-1-5-21-1871414953-1985939503-3453997553-1003_Classes:Process 1652 (\Device\HarddiskVolume3\Windows\System32\svchost.exe) has opened key \REGISTRY\USER\S-1-5-21-1871414953-1985939503-3453997553-1003_CLASSESEvent Xml: <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event"> <System> <Provider Name="Microsoft-Windows-User Profiles Service" Guid="{89B1E9F0-5AFF-44A6-9B44-0A07A7CE5845}" /> <EventID>1530</EventID> <Version>0</Version> <Level>3</Level> <Task>0</Task> <Opcode>0</Opcode> <Keywords>0x8000000000000000</Keywords> <TimeCreated SystemTime="2009-03-15T23:11:14.286077500Z" /> <EventRecordID>2722</EventRecordID> <Correlation /> <Execution ProcessID="932" ThreadID="2528" /> <Channel>Application</Channel> <Computer>Bankslay-PC</Computer> <Security UserID="S-1-5-18" /> </System> <EventData Name="EVENT_HIVE_LEAK"> <Data Name="Detail">1 user registry handles leaked from \Registry\User\S-1-5-21-1871414953-1985939503-3453997553-1003_Classes:Process 1652 (\Device\HarddiskVolume3\Windows\System32\svchost.exe) has opened key \REGISTRY\USER\S-1-5-21-1871414953-1985939503-3453997553-1003_CLASSES</Data> </EventData> </Event>