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I tried to install qgis on my laptop with Windows 7 Professional and it is a 64 bit machine. after going through the procedure described below I got the message "Mount Access Denied". What is going on? Any help would be greatly appreciated. Thank you.

I downloaded osgeo4w-setup clicked on install using "Advanced Install"; Selected "Install from local directory"; Selected "C:\OSGEO4W" as the root directory for the install; Expanded "Desktop" Selected "qgis" Selected "1.8.0-5" Expanded "Libs" Selected "GDAL" Selected "1.9.2-2" Clicked "NEXT" Message: "Mount: Access Denied"

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Looks like you do not have the right to create folders in C:\ Root directory. Try the same with admin rights, or check the rights you have on C:\

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When you "click on install", try right-clicking it instead, then choosing "Run as Administrator". You may need to provide credentials for an admin account when you do this. – user3461 Mar 28 '13 at 11:37
I definitely have the rights, I also have previously installed to the same directory. BTW on the D: drive. But this fixed it for me. it seems there may be something different about the install. – Brad Nesom Oct 25 '13 at 14:12
I believe it is because of the msvcrt files being installed. I had not noticed this process before. And now on completion I get a notice that inuse files are being scheduled for replacement on restart. I must restart as soon as possible to ensure completion. This is probably what require admin status. – Brad Nesom Oct 25 '13 at 14:24

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