Dll could not be opened at vista startup..what to do?

First of all, open an elevated command prompt, if u're using vista or win7 (right click on cmd and select run as administrator)

Then type in the following commands.. hit enter after each command...

net stop cryptsvc
net stop bits
net stop wuauserv
ren %systemroot%\system32\catroot2\Edb.log *.bak
ren %systemroot%\system32\catroot2 cat
exit

DO NOT RENAME OR DELETE ANYTHING PRESENT IN another folder named CATROOT, rename only the catroot2 folder

then click on start and browse to the folder
%systemroot%\softwaredistribution\
delete everything present in it

browse to the following folder
%systemroot%\system32\CatRoot\{F750E6C3-38EE-11D1-85E5-00C04FC295EE}
search for files tmp*.cat in it... delete them, DO NOT DELETE ANYTHING ELSE

now, we will unregister and re-register a few, 10 i believe, dlls
open an elevated command prompt once again,
and type in the following commands, or you can create a batch file ...
first we will unregister

regsvr32 /u softpub.dll
regsvr32 /u wintrust.dll
regsvr32 /u initpki.dll
regsvr32 /u dssenh.dll
regsvr32 /u rsaenh.dll
regsvr32 /u gpkcsp.dll
regsvr32 /u sccbase.dll
regsvr32 /u slbcsp.dll
regsvr32 /u mssip32.dll
regsvr32 /u cryptdlg.dll
exit
now restart the computer..

again open an elevated command prompt..
now we will re-register

regsvr32 softpub.dll
regsvr32 wintrust.dll
regsvr32 initpki.dll
regsvr32 dssenh.dll
regsvr32 rsaenh.dll
regsvr32 gpkcsp.dll
regsvr32 sccbase.dll
regsvr32 slbcsp.dll
regsvr32 mssip32.dll
regsvr32 cryptdlg.dll
exit
again restart

after restarting, in start search, type in, services.msc and hit enter
We need to check whether three services, namely,
Background Intelligent transfer Service (BITS),
Audomatic Update Service (wuauserv),
Cryptographic Services (cryptsvc);
are started and set to automatic or not, if not start them, and set the startup type as automatic...

Now perform the updates again, and the issue should be resolved...

Issue: Cannot Print from Internet Explorer
Symptoms : When you attempt to print a document or look at it in print preview, you may receive the following error message:
Line: 539
Char: 2
Error: Invalid argument.
Code: 0 URL: res://C:WINDOWSSYSTEMSHDOCLC.DLL/preview.dlg CAUSE : This issue can occur if the Iepeers.dll file is corrupted or is the incorrect version
Resolution: To resolve this issue, replace the Iepeers.dll file. To do this, follow these steps:

1. Restart the computer in MS-DOS mode or with a startup disk.
a. For Windows 98 and Windows 95 , click Start, click Shut Down, click Restart the computer in MS-DOS mode, and then click Yes.
b. For Windows Millennium Edition (Me), use a Windows Me startup disk and click Start Computer without CD-ROM Support.

For additional information about how to create a Windows Me startup disk, click the article number below to view the article in the Microsoft Knowledge Base:
267287 (http://support.microsoft.com/kb/267287/EN-US/) How to Create a Startup Disk in Windows Me

2. Type the following commands, pressing ENTER after each command:
c:
cdwindowssystem
ren IEPEERS.dll IEPEERS.old
exit

3. Extract a new copy of the Iepeers.dll file to the WindowsSystem folder. You can extract the Iepeers.dll file from the following location:
The IE_5.cab cabinet file included with Internet Explorer 5.5 for Windows 98.

4. Register the Iepeers.dll file. To do this, click Start, point to Run, and then type the following line:
regsvr32 IEPEERS.DLL

5. Click OK.

6. Restart your computer normally.