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Before you access your usb, scan it first with your anti-virus software. This will prevent the virus from spreading on your pc or laptop

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delete autorun inf virus 4gb

If you have a autorun.inf virus on your memory card/USB stick the anti virus software on your PC may not allow access in order to stop it from spreading.

First you need to disable autorun feature on Windows operating system :

Follow steps in link :


After disabling the feature you will have access to your memory card/USB stick. The next step is to delete autorun.inf virus file hidden on your memory card/USB stick. But first you need to make the hidden virus file visible.

Follow steps in link to show hidden system files :


Now navigate to your memory card/USB stick you should see the autorun.inf file - DELETE IT.

(If it doesnt allow you to delete it - restart the PC in safe mode by pressing F8 on start up and choosing safe mode and try again)

Back up your files on the memory stick/USB stick to your PC and to make sure the virus is gone from the memory stick/USB format it using your PC.

Dont to forget re-hide your system files to prevent accidental deletion.

Good luck!

Oct 15, 2013 | SanDisk 1GB microSD Memory Card

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when i insert my pen drive it appears.but when i click open "this operation has been cancelled due to restrictions in effect on this computer".how can i solve this problem ?

Myself have a Cruzer Contour (4GB) also, I happen to meet this error when use it on one of my client notebook. It seems that a antivirus/anti-malwares software blocking the "Autorun" program been execute, in order to prevent wide spread viruses came from pen drive information sharing.
(Sorry.... cannot recall which antivirus software...)

Some how the Sandisk Cruzer is carrying a build in program called "U3 Luanchpad", which also happen to using "Autorun" approach. Very high chances you might caught in this situation.

Please perform a virus/malwares scan on the thumbdrive. if USB happen to be found nothing related to the "Autorun" after scan, and able to use on other PC/NB environment (which not the same anti-virus amd anti-malwares been used). It will be pretty sure the problem lies on the software I mentioned in your PC/NB.

Oct 08, 2010 | SanDisk Cruzer Micro 4GB USB 2.0 Flash...

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