A install of windows 7 was started by a bootable usb on my IBM THINKPAD X41 TABLET that had Windows XP. Question is...Can Win 7 be on the IBM thinkpad because win 7 needs at least a Pentium 233 MHz

SOURCE: reinstalling windows xp on a new hard drive - Thinkpad t30

You can go about this 2 ways.
First, if you have, or can get your hands on a copy of Windows xp; Load the windows system, then go to the IBM support site and download your drivers. Then you will be ready to go.
Secondly, call IBM support and get a set of recovery cds. You will have to have the information from the stickers that are on the bottom of the pc. I don't remember the exact cost, but as I remember it's about $54-55. Usually takes a couple of days to receive them.
Either way that you do it, you're going to wrap up a couple of hours.
If you need any additional information, please feel free to ask. If this information has assisted you in the resolution of you problem, please return here to give my assistance an appropriate final rating. If this information has answered your question and/or lead to a resolution, please rate it as "Fixya!".
Thank you, and have a super day!
Ron-

SOURCE: IBM Thinkpad T22 USB problem

try re-installing the driver

SOURCE: need a dvd driver download for Ibm thinkpad t20 for windows xp

You can find the drivers for that unit here:

http://www-307.ibm.com/pc/support/site.wss/document.do?sitestyle=lenovo&lndocid=MIGR-4JSQHB

SOURCE: ibm thinkpad modem problems

You may have installed the wrong driver version. Some Thinkpads may have different manufacturers of the same type of devices installed in the laptops, therefore you need to install them one at a time until you find one that works. Go to the IBM/Lenovo WEB site - support/download page and download the latest Windows XP or Vista device drivers for your model computer, Use this link :- http://www.ibm.com/products/finder/us/finders?pg=ddfinder&cm_re=other-_-suprcn-_-download You can download the various drivers and then you click on and run the variour drivers, they will then unzip and expand into a folder on C:\drivers Then install the various drivers from this folder.

SOURCE: How do I reset the password to log on to an IBM

download user guide from here and follow the instruction...

click here