Solved

Drive letter designation (C:) on my primary partition has been lost

Posted on 2006-11-23
6
812 Views
Last Modified: 2008-01-09
My system will not boot.  It gets as far as the Windows XP logo with the 'busy bar' going back and forth, hangs for a while, and then reiterates the entire reboot process.  Starting in Safe Mode reveals a hang at MUP.DLL.  

I booted Partition Magic from a bootable CD and discovered that the primary partition has no drive letter allocated to it.  Running FDISK shows the same problem, but I can't seem to do anything about it.  I tried PQBOOT, too.  (There is also a small partition which is described as FREESPACE.  It has no drive letter either)

How can I restore drive letter C without erasing the entire operating system?
0
Comment
Question by:bigdud
6 Comments
 
LVL 92

Expert Comment

by:nobus
ID: 18006299
0
 
LVL 9

Expert Comment

by:DjDezmond
ID: 18006338
Safe mode normally takes ages to load the MUP.SYS file (is it definately DLL file, or SYS?). If you leave it to load it should eventually load into safe mode.

Once in there, right mouse click on the my computer icon and click "Manage" to load the computer management MMC. Click on "Storage\Disk Management", Right mouse click on 'Disk0' and select "Change drive letter and paths..."

This will allow you to reassign the drive letter to the partition.
0
 
LVL 6

Accepted Solution

by:
CyberGhost earned 200 total points
ID: 18006431
There are 2 possible issues I can think of:

1. you might have been infected by a virus and this damaged some parts of your operating system or even changed the partition table, so you have the 'no C:\ letter' problem. In such case, I don't think you can just restore the C drive letter. You would probably have to reinstall the whole operating system.
You might also try to plug your hard drive to another computer that has a working OS (and some good antivirus on it) and see what happens. If that OS can recognize your drive, you can copy any files that you need from the Windows folder and perform new installation on your own computer.

2. the other option is that your hard drive is damaged. In such case, I'd also try to plug the hard drive to another computer (with working operating system and some antivirus installed) and check if that computer can see the drive. If so, I'd copy as much data from the drive as possible and buy a new drive. You might be able to mirror those parts of your damaged disk that work and restore them to a new drive, althought, I don't know any applications that can do it.
0
Comprehensive Backup Solutions for Microsoft

Acronis protects the complete Microsoft technology stack: Windows Server, Windows PC, laptop and Surface data; Microsoft business applications; Microsoft Hyper-V; Azure VMs; Microsoft Windows Server 2016; Microsoft Exchange 2016 and SQL Server 2016.

 
LVL 92

Expert Comment

by:nobus
ID: 18006456
the mup.sys problem can be caused by nearly everything, hard and soft.
you can disconnect all devices and cards not needed for booting, and test.
0
 

Author Comment

by:bigdud
ID: 18007799
Thanks for your quick responses, guys.  I have an update:

1. Sorry, I meant MUP.SYS, not DLL.  

2. Even in safe mode, after a half minute or so, the delay at MUP.SYS falls thru and the entire boot process reiterates.  So I cannot get into the operating system under any circumstances.

3.  This is a laptop, and I cannot try the drive in another computer.

I'm inclined to agree with CyberGhost,  and looking forward to reinstalling the operating system.
Any final suggestions?
0
 
LVL 92

Assisted Solution

by:nobus
nobus earned 50 total points
ID: 18007825
try a repair install :  
http://www.michaelstevenstech.com/XPrepairinstall.htm      
0

Featured Post

Back Up Your Microsoft Windows Server®

Back up all your Microsoft Windows Server – on-premises, in remote locations, in private and hybrid clouds. Your entire Windows Server will be backed up in one easy step with patented, block-level disk imaging. We achieve RTOs (recovery time objectives) as low as 15 seconds.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Step by step guide to Clean and Sort your windows registry! Introduction: Always remember: A Clean registry = Better performance = Save your invaluable time In this article we're going to clear our registry manually! Yes, manually! The e…
Issue: Unstable cursor in Windows XP and Windows runs extremely slow in that any click will bring up the Hour glass (sometimes for several seconds before giving you what you want) . Troubleshooting Process and the FINAL FIX: This issue see…
This Micro Tutorial will teach you how to censor certain areas of your screen. The example in this video will show a little boy's face being blurred. This will be demonstrated using Adobe Premiere Pro CS6.
Two types of users will appreciate AOMEI Backupper Pro: 1 - Those with PCIe drives (and haven't found cloning software that works on them). 2 - Those who want a fast clone of their boot drive (no re-boots needed) and it can clone your drive wh…

831 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question