Uncategorized

 

Problem:

How to check optimal WAN MTU settings.

Solution:

The primary reason is that in most if not all cases if you send packets at 1500 they will need to be fragmented resulting in degradation of performance. I would not reccomend changing the MTU settings without first checking the optimal settings for your environment, do not just take the word of your ISP, they are making a generalized statement that covers the masses, it is not a total optomization.

Checking is easy to do. First make sure that your MTU setting is in fact 1500 or the test is compromised and will result in a number that is too low.

The command is to see the largest packet is “ping -f -l XXXX www.XXX.com” -f -l forces the ping packet size to be what you specify, any size to lage returns a reply that the packet needed to be fragmented.

-l is a lowwercase L
XXXX is mtu speeds start at 1500 and decrease in multiples of 10 (1500, 1490, 1480 etc…) until you get a ping result, then increase in multiples of 1 until you again get the reply that the packets needed to be fragmented. The highest numbet that did not have to be fragmented is your highest optimal number. I would actually suggest decreasing it by 2. So if 1464 is the highest you could send without fragmentation set the MTU to 1462.

and XXX is a website of your choosing.

 

Problem:

The User Profile Service failed the logon, loging on with a temporary account

Solution:

In the past, we’ve “fixed” this by creating a new profile and copying all the data from the old one (in the users or documents and settings folder) over to it. However, you can try this registry fix first;

Step 1. To fix the user profile, click Start and type regedit into the search box and press Enter.

Step 2. Registry Editor will launch and you need to navigate to the following key:
HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindows NTCurrentVersionProfileList

Step 3. Click each S-1-5 folder and double-click the ProfileImagePath entry to find out which user account it relates to

 

Problem:

Power on windows, but Avast Grime fighter immediately loads and cause a black scren – never moves farther than that. To make matters worse, there is no entry in the BIOS for this boot option.

Solution:

If your system runs Windows 8 or 8.1, please try this:

Boot to a Windows CD. You may have to disable Secure boot or mess wit UEFI settings in the bios to do this. As lon as the CD is the first boot device, it should allow you to bypass Grimefighter.

Select “Advanced options” -> “Troubleshoot” -> “Advanced Options” -> “Command Prompt”

Login to your Windows account if it prompts you

In the command prompt type (without the quotes)  “bootrec /fixboot”  and hit ENTER

Then type “exit” and hit ENTER

Select “Turn off your PC”

Power on the PC with the power button

If the above “bootrec /fixboot” command doesn’t work for you, you can remove the Grimefighter boot entry manually by booting back to the command prompt and doing this:

run “bcdedit /enum firmware”

Scroll up and look for the Windows Boot Manager entry with a description of Avast! Grimefighter

There will be an identifier number for this entry, it will be a random string of numbers like {233a9f91-efd8-4771-a9c7-5f4ecc823458}

Hightlight the identifier, including the curly braces, this will copy the identifier, so you can paste it into the next command, to paste after highlighting, you hit the right mouse key

Scroll back down so you can run another command

To delete the Grimefighter entry run “bcdedit /delete {233a9f91-efd8-4771-a9c7-5f4ecc823458}” using the identifier you have copied for your Grimefighter entry instead of my example one, be very careful here and make sure the identifier you delete is the one for Grimefighter, double check it before hitting ENTER

 

Problem:

If security center service is missing or damaged, or antivirus software is not installed and current, Outlook 2010 will not allow sync with other apps without prompt.  Eg. Commit.

Solution:

You could try adding the following key to the registry:
HKEY_LOCAL_MACHINESOFTWAREMicrosoftOffice14.0OutlookSecurity

In this key add the following value:
ObjectModelGuard, DWORD =2

The values 0, 1 and 2 correspond to the options in the Programmatic Access Security settings in the Trust Center.
0 = Warn if Anti-Virus is out of date (recommended)
1 = Always warn
2 = Never warn