Can't install BOINC 7.8.2 on Win10 to replace previous version because a drive letter reassignment between versions occurred

Message boards : Questions and problems : Can't install BOINC 7.8.2 on Win10 to replace previous version because a drive letter reassignment between versions occurred
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EricTMussard

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Joined: 23 Sep 17
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United States
Message 81555 - Posted: 23 Sep 2017, 20:22:12 UTC

I am currently not running any version of BOINC because I attempted to install BOINC 7.8.2 which removes the previous version and the install failed. I did not try to install BOINC as a service. I am running Windows 10 Home. I have been a participant in the SETI@home project since January 3, 2016.

The problem is I ran out of SSD disk space for my C: drive and had to use Windows storage management to extend my disk storage for Windows. Unfortunately, I decided to select the drive (D:) that was previously used for the SETI@home data and the storage management process not only erased the contents but also reassigned the drive letter to R:. In so doing, other drive letters got reassigned. My DVD ROM drive now has the drive letter D: which was previously the SETI@home data drive D:. The BOINC 7.8.2 installer remembers the data storage drive (D:) and folder but when I attempt to change this to the drive letter R: and a new folder, an interruption to the installer occurs and there is no other option than to end the installation.

What to do?
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Richard Haselgrove
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Message 81556 - Posted: 23 Sep 2017, 20:30:03 UTC - in response to Message 81555.  
Last modified: 23 Sep 2017, 20:31:02 UTC

This has been a known problem with earlier versions of BOINC and Windows, and I expect the same procedure will work.

You will need, I'm afraid, to edit the Windows registry, using the tool regedit

Find the following values (this is my custom setup)

[HKEY_LOCAL_MACHINE\SOFTWARE\Space Sciences Laboratory, U.C. Berkeley\BOINC Setup]
"INSTALLDIR"="D:\\BOINC\\"
"DATADIR"="D:\\BOINCdata\\"
Change the two path names (the first is for BOINC's programs, the second for data) to match your new drive letters and preferred folder structure.
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EricTMussard

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Joined: 23 Sep 17
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Message 81558 - Posted: 24 Sep 2017, 4:03:36 UTC - in response to Message 81556.  

The information that you have provided has resolved the issue with the BOINC installation.

Thank you very much for your guidance. I applied the changes to the registry and all is well.

Best Regards
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Message boards : Questions and problems : Can't install BOINC 7.8.2 on Win10 to replace previous version because a drive letter reassignment between versions occurred

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