How can I change my user account back to administrator?  I am not able to make any changes to my system

I just read the problem below and thought I would see if anyone here can
help me.
Last week my computer failed so I bought a new hard drive and a new power
unit.  I found that it was the power unit that had failed so have kept the

Suddenly, out of nowhere, my computer will no longer play sound from the
internet, i-tunes, media player, or cd drive. It will still play sound from
my music recording software, but only that. I made no changes and do not
understand why this happened. Please help

I had a problem with malware on my PC. As a result I am trying to reformat
the hard drive to start anew. However my system keeps crashing when I am in
the middle of the reformatting process. It is always at a random spot in the
process. Is there any know way to fix this problem?

I have a previous question on the Windows Installer not working right. The
ultimate conclusion of this issue was that I had to reinstall Win XP. I have
been holding off doing this so I would not loose any software on my machine.
I have continued to search for solutions to this ...

After doing a new install of Windows XP Home Edition, upgrading Nvidia
Drivers and installing Service Pk 2, my task bar turned to gray and window
appearance looks like Windows 2000 in all characteristics.  I'm not sure if
this means something is not working correctly.  I have ...

Is there anyway I can relocate the recycle bin to somewhere like a dedicate
drive?  I know you can set each drive separately of its total occuping
percentage but that only apply to files on that drives only.  I was wondering
if is there any way I can set the recycler for C:\ to ...

I'm writing this for XP, but it's the same problem with Vista on my dual-boot
PC...
I recently encountered a power surge, which caused my PC to shutdown. I was
running in XP at the time.

I have a little problem.
Always when a shared object like a printer or a file-share is not reachable,
cause the network is temporary unreachable, my xp client wait for timeouts,
when I start the windows explorer or try to print.

Not sure when/what caused problem but 'restore' did not fix.  For the past
few days, all files (Word & Excel) and folders now appear as 'read only',
when I click on properties. Also the Advanced Properties tab no longer allows
me to change icons, except for  shortcuts, which I ...

When I start my computer, and it goes thru the boot sequence, the numbers and
letters are garbled.When the Windows logo appears, its fuzzy and garbled.When
the sign on screen appears, it has bands of green lines thru it, as well as
every screen thereafter. Does anyone know how to ...

I am considering putting RAID 1 on the new machine I am building, with XP Pro.
Reading the documentation on the Intel motherboard it seems one needs to do
the <F6> tinkering with the BIOS at the very beginning of the installation of
XP Pro.

While defragmenting drive c: on my Windows XP Professional machine,
defragmentation stops after doing analysis and gives the error: "-
"Connection to defragmentation engine is lost. Restart
defragmentation."Connection to defragmentation engine is lost. Restart

When I start my computer, and it goes thru the boot sequence, the numbers and
letters are garbled.When the Windows logo appears, its fuzzy and garbled.When
the sign on screen appears, it has bands of green lines thru it, as well as
every screen thereafter. Does anyone know how to ...

I have a plotter/cutter that uses com port 8.
a program I need to use only goes to com port 7.
I have XP and have tried to cange it in device manager but there isn't a
place to do it.