i learn this command when one my computer cannot start,the 'cannot start situation is like this: after the bios thing appear,it jz straight appear: Winnt_root\System32\Hal.dll missing or corrupt: Please re-install a copy of the above file. Then i got two pc ,so i use other pc do search for this problem and microsoft say boot the xp disc and choose the repair option and type bootcfg /rebuild,is this command work for all windows cannot boot in problem?

boot/cfg is frequently used to scan a computer for other OS (NT, W2K, XP) installations and add them to the boot.ini... I note the M$ article that mentions you use it to resolve your current problem; not a path I would have gone... Try the method-3 approach in that same KB? http://support.microsoft.com/kb/314477 Also have a read of the suggestions at: http://pcsupport.about.com/od/findb... One possible resolution is to do a Repair installation - the one that doesn't lose data etc... It is one of the later suggestions in the above link. And this link tells you how to do it very clearly too; read it very carefully first - before you go this path... http://michaelstevenstech.com/XPrep... Be careful to follow the instructions carefully - especially step #3. DO NOT use Recovery Console; but move onto step #5 But first try some of the earlier ideas in the pcsupport link...

I see now...but i try the xp repair install once my computer broken but until its appear : Please wait.... Then i wait for 30 minutes but still no progress,then i restart my computer again,is it require so much time?

Can you explain what happend originally; why you have this problem - what happend first? Did you change anything in the system at all - afterwhich the problems appeared?

hmm....i 4gt wad is the problem bt i jz try it,it is another problem....this solution use for specific situation?

mmm - Without knowing what happend immediately prior to (before...) the problem appeared it's not easy to know what to suggest... Did you at any time re-install the OS itself - for whatever reason?