Repair corrupted registry(windows is not booting..corrupted \WINDOWS\SYSTEM32\CONFIG\…)

Originally from http://support.microsoft.com/kb/307545

Download this.,extract it and follow the steps in read.txt.Steps are as follows:

copy the files default.bat and restore.bat files in the pendrive.Insert it into usb port.

>>default.bat::
To restore windows registry to default(all drivers,softwares,user account etc settings will be loaded to default i.e.drivers,softwares,user accounts have to be installed again)

1>Insert XP professional CD,(see that boot order is cd/dvd drive as 1st option)…Press any key to boot from cd..(press enter)

2>After loading of default system files..
press R…to repair from CD(recovery Console)

3>wait for approx 20 seconds..choose windows folder by pressing 1 or any other key(eg. for 1. C:\windows press 1)

4>type administrative password…
majority do not have password..so press enter to continue( or if u have any password type it and press enter)

5>type
X:
(where X is pendrive’s drive letter…u have to do hit and trial …type dir to see the contents of the drive,eg. E:)

6>now type
BATCH default.bat

7>to restart type
exit

Done!!

=====================================================

Optional (u want to get back ur old registry settings…just in case..read on)

>>restore.bat::
after running default.bat,u want to restore back to ur old registry settings run this file.

steps 1 to 5 as above

6>now type
BATCH restore.bat

7>to restart type
exit

Done!!

 

Group Policy(gpedit.msc) for Windows XP home edition

Windows XP home edition do not have Group Policy installed by default.But it can be done.

Download from here.Extract,run execute.exe.

Now,start>>run type gpedit.msc

Done!!

 

Few more troubleshoots in Windows>>

Home/avg. office  users run Windows in administrative mode only.Thus problem arises when any file downloaded from internet or copied from pen drives contains Trojans/viruses that changes registry entries and/or copies viruses (in system32 folders or in other areas replacing/corrupting system files) without any confirmation from the user.Thus if a windows user(who is a very active internet user ie frequently downloads files from net)has to use his OS efficiently,do at least one of the following:

>>must have a good updated Antivirus+antispyware.
or,
>>if AV and AS are not affordable,use internet in non admin mode eg. in Guest account or use Linux(eg.Ubuntu) for surfing net.

If not they have to suffer with crashes or system hangs or system vulnerabilities(like key loggers to steal passwords or pin nos.)

Few problems and their soln:
>Windows cannot find explorer.exe (even though you can see it is present in c:\windows folder using cmd):
open regedit from taskmanager>>New task:
navigate to HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options,if on expanding there is a key name explorer below EncryptPatchVer.dll then delete the key explorer.Done!!

>Data Lost??

one of the Best tool available:
Easeus Data Recovery Wizard Professional

to be continued………..

 

.exe not opening??

None of the windows application (.exe ) is opening.eg.Open With window etc is coming.

Do the following:

Download this,extract.open exe_work.cmd
Done!!

OR,
Open Command Prompt by typing command in RUN.
type cd\windows
now in c:\windows>
type regedit

navigate to HKEY_CLASSES_ROOT\.exe
In right-side pane, change value of Default key to exefile

Now navigate:
HKEY_CLASSES_ROOT\exefile\shell\open\command

In right-side pane, change value of Default key to:
“%1″ %*

Done!!