Trouble Re: (0x81000370) using IM, MSN, Hotmail in a Ltd Account

I have just upgraded my PC to Windows XP Pro (from XP Home) and have found that Microsoft IM, and in-fact, access to hotmail and MSN does not work from the Limited Accounts set-up on the PC.  The specific error is “0x81000370”

The programs / websites work fine from the other account, which is an administrators account and work fine when I change the Limited Account to a Computer Administrator.

I have tried the following:

* Disabling the Norton Firewall & Anti-virus (no affect)
* Re-installing IM v6.1 (no affect)
* Disabling the XP Firewall (no affect)

– although the above should not make a difference since it works when the account is changed to Administrator.

Finally, from an earlier posting, I have also tried the following procedure, which also did not work:

"1.  The date on your computer needs to be set properly -- double click the clock verify that
the time and date are set.

2.  Clear your IE cache and cookies -- open Internet Explorer, click the Tools menu, then
Internet Options, then click the Delete Files button, and when that's complete click the
Delete Cookies button.

3.  Check your IE Security settings -- open Internet Explorer, click the Tools menu, then
Internet Options, then Advanced tab, scroll to the Security section, and verify that "Check
for server certificate revocation" is unchecked.  Also verify that 'Use SSL 2.0' and Use SSL
3.0' is checked, then click OK.

4.  Click Start, then Run, and enter the following: regsvr32 softpub.dll - then click OK"

Any ideas how to solve this mystery?

Thanks