How to protect against trojan?? Excellent trick to protect against trojan.
How to protect against trojan?? Excellent trick to protect against trojan.
I have explained two major articles on How to recover files from trojan horse and protect from email attached virus. Well these two articles will clearly explains you how to protect against trojan horse and viruses. Well this article directs you to small and damn sure trick to protect against trojan……..
Just make the following changes to the Registry key to protect against Trojans.
Open Regedit and go to ” HKEY_CLASSES_ROOT/batfile/shell “.
Now right click on the default entry and choose “Modify”, and type Edit. Now close Regedit.
You can have preview all batch files before executing those files. Right-click and choose “Open” to run a batch file.”
This tricks uses ” Distructive” interneal/ external DOS commands, like FDISK, FORMAT, DELTREE, DEL etc to wipe out entire drives. So this trick refers to Potential “Trojans”/”Bombs”.
There is one more excellent way to protect against Trojan without hacking Registry is to go to Folder ->Options under Settings and choose MS-DOS Batch Files.
Now edit the associations and choose Edit as the Default for double-click. I hope this is the best trick to protect against trojan.
You can’t use the Folder Options dialog in Windows Explorer to change the default command for MS-DOS Batch Files, without editing the Registry and changing the “EditFlags” Binary Value to “01 00 00 00″ (must be typed exactly like that, without quotes or spaces), which appears under this Registry key (as shown by Regedit.exe):
HKEY_CLASSES_ROOT/batfile.
You can create a new command in the Folder Options dialog, but without using that Registry hack you can’t set it as the default action, which defeats the whole purpose.
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How to Increase DNS (Domain name Server) Cache??
How to Increase DNS (Domain name Server) Cache??
Windows has an efficient DNS cache. You can increase DNS cache and its overall performance by increasing its size.As you type anything in the broswer in any Operating system it stores all addresses in DNS cache. This cache is referred to before a request is sent out over the Internet when the user requests a web page address. That is when you any website in broswer your computer is sent DNS -> IP resolver data from your DNS (Domain Naming System) server. The data you are entering in the browser is stored in a local data cache on your machine. Your machine does not have to ask for the location every time when you revisit that website again. Addresses will not be deleted untill we delete them.
Well , to increase DNS cache and its overall performance we have to increase its size. this can be done by small navigation in REGEDIT folder.
Open REGEDIT and navigate to ‘HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Dnscache\Parameters’
In the right hand pane create (if not present) or modify (if present) these DWORD [REG_DWORD] values (no quotes): “CacheHashTableBucketSize”, “CacheHashTableSize”, “MaxCacheEntryTtlLimit”, “MaxSOACacheEntryTtlLimit”, “NegativeCacheTime”, “NetFailureCacheTime” and “NegativeSOACacheTime”.
The Decimal values that seem to work well are (consecutively): 40 (default: 10 ; range: 0 – 50), 307 (default: 211 ; range: use ONLY prime numbers except 0!), 43200 (default: 86400 seconds = 24 hours ; range: 0 – 4294967295) and 90 (default: 120 seconds = 2 minutes ; range: 0 – 4294967295), 0 (default: 300 seconds = 5 minutes ; range: 0 – 4294967295), 0 (default: 30 seconds ; range: 0 – 4294967295) and 0 (default: 120 seconds = 2 minutes ; range: 0 – 4294967295).
It is better to leave the above parameters unchanged unless you understand about TCP/IP and DNS systems function.
Categories: Computer and Internet tips Tags: domain name server cache, how to, increase dns cache
How to restore the operating system to a previous state in Windows XP?? And Undo Restoration???
How to restore the operating system to a previous state in Windows XP?????????
Yes you can restore your operating system to a previous state in windows XP very easily. Most of the XP users perform this step to backup their data. Some times your system files may be infected and you cannot see those files. To prevent this situation you can do system restore tool to return your computer to a previous working state.System Restore takes a snapshot of critical system files and some program files and stores this information as restore points, this is how programming runs inside the operation system.
Following procedure explains you How to restore the operating system to a previous state in windows XP:
1. Log on to Windows as Administrator. After entering into windows click on Start-> Point to all programs-> Accessories-> Now point to system tools.
2. After opening System Tools click on System Restore. System Restore starts.
3. A welcome page opens for system restore. Now click Restore my computer to an earlier time (if it is not already selected), and then click Next.
4. On the System Restore page, click the most recent system checkpoint in the On this list. Be sure before choosing restore point. A System Restore message may appear that lists configuration changes that System Restore will make. Click OK.
5. Now click next as soon as confirm restore point selection page opens. It takes time to restore data.System Restore restores the previous Windows XP configuration. It automatically restarts the computer as soon as system restore finished.
6. Log on to the computer as Administrator. The System Restore Restoration Complete page appears.
7. Click OK.
If you are facing any problems after restoration then you can restore Windows XP to a previous configuration that you do not want. Follow steps for undo restoration:
1.Log on to windows XP as a administrator.
2.Click on Start -> All programs-> Accessories-> Now point to system tools and then click on System Restore.
3. Same as above System Restore welcome page opens. Now click on Undo My Last Restoration, and then click next. A System Restore message may appear that lists configuration changes that System Restore will make. Click OK.
4. Same as above confirm restoration undo page opens for confirmation. Click next to confirm and System Restore restores the original Windows XP configuration, and then restarts the computer.
5. As usual log into your system as Administrator. The System Restore Undo Complete page appears.
6. Click OK…. 