Member Avatar for bobfrancis10

Hi,
I was helping my brother install Norton Internet Security, part way through we got "error 1327 invalid drive c:\" Looking at his drives he as 1 floppy A:\
two cd/dvd drives G:\ and H:\ and the hard drive is I:\. Any ideas on solving this problem would be most appreciated.
Bob.

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Dani AI

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Good catch, — and : because the system drive letter was not manually changed, a focused, safe checklist helps pin down why the Norton installer reports "Error 1327 invalid drive C:\" on an XP system whose hard disk shows up as I:.

Start with low-risk checks:

  • Disconnect all USB and removable devices (card readers, external drives, flash sticks) and reboot; multi-slot readers often create many logical drives and can shift other letters.
  • Open Disk Management (Right-click My Computer > Manage > Disk Management) and note which volume is labeled "System" and which is "Boot", plus assigned letters. Do not attempt to reletter a volume marked System/Boot from here.
  • From a command prompt run subst and net use to reveal any substituted or network-mapped letters that installers might try to use.

If the problem continues, inspect installer-related registry pointers carefully. Export and review HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders and User Shell Folders for entries that reference a non-existent drive letter; correct any invalid paths only after backing up the key. The HKEY_LOCAL_MACHINE\SYSTEM\MountedDevices subtree contains drive-to-GUID mappings; editing or deleting entries there can reassign letters but carries significant risk — always back up the registry and understand that incorrect edits can prevent boot.

Other quick measures that often work: run the installer with local Administrator rights, temporarily change the install path to an available drive, or remove stale network/subst mappings. Providing a Disk Management screenshot or the subst/net use output makes it straightforward to identify the exact registry keys to adjust.

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Member Avatar for pcschrottie

Did you at any time change the drive letter of your Windows XP partition? And what's with C:\ - F:\ ?

Michael

Member Avatar for bobfrancis10

We have not changed anything, the drive listing is as stated in my first post, what's happened to C:\-F:\ I have no idea, that's why I posted in the first place, I am completly confused. The PC is as received from the retailer.

Bob.

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