then you may be in luck.
First of all, tell us why you cannot access these existing Admin accounts. What error messages?
When you set up your own Admin capable account in XP, the pre-installed System Administrator account, (the one that allows you to access the system as an administrator in the first place), goes into hiding. It disappears from the Welcome Screen.
But that System Administrator account will reappear if you boot up the computer into Safe Mode. Guidance for doing that, using the F8 method, here.
Once at the Safe Mode list of options, select the top one, then select the System Administrator account. It originally has no password set, so either select and click, or if you made it a passworded account, enter the password and click.
If you get in, then you have more options, depending what caused the loss of access in the first place. For example;
1] If malware caused this, scan with your anti-malware utilities.
2] If the other accounts became corrupted, you can create a new Admin account, and copy the data and settings from the old profile to the new one;
How to copy data from a corrupted user profile to a new profile.
I hope that helps.
My Dimension 4500 (XP) has developed a serious fault and fails to log-in to accounts with Admin rights, ie password protected. There are two other accounts which do not need a password to log-in and these open correctly and I am able to use them to run some programs and for some limited use of the internet. But I cannot access my E-mails on that computer. Using Acronis, the C:drive is separately backed-up on an external hard drive which I can also interrogate from my Inspiron computer. I cannot use the LAN to contact the faulty computer from my other computers although the LAN operates satisfactorily between them. The breakdown could extend to the other computers if a fault occurred to the router since this is controlled from the Admin accounts which cannot be opened.
Please can anyone tell me how I can open the accounts with Admin rights?
I am aware that I could reformat the C: drive, re-load Windows XP etc but I would be grateful if someone could suggest another, less drastic, approach to solving this problem.
Dimension 4500, 2.53GHz processor, 1024Mb, XP, 160Gb hard disk, 80Gb hard disk, Roxio CD R/RW, Blueyonder Broadband & LAN, Dell Photo All-in-One printer. Iomega 500Gb hard disk
Dimension 4100, 1GHz processor, 256Mb SDRAM, ME, 20Gb hard disk, Adaptec CD R/DW, HP Deskjet 840C, Scanjet 3300c, Blueyonder Broadband & LAN.
Inspiron 8600, 1.4 Ghz processor, 512Mb SDRAM, XP, 40Gb hard disk, Philips CDRW/DVD disk drive, Blueyonder Broadband & LAN.