How to read, calculate and set MTU in Windows, Linux and OSX

After I released the MTU Optimizer, a small tool for determining the optimal MTU, some days ago, let’s look at how to determine the optimal MTU by hand, how to read the currently set MTU and how to set new MTU value now. Of course we will discuss the whole thing for the three major operating systems: Windows, OSX and Linux.
Before we look at the implementation within the individual operating systems, we first briefly clarify what the MTU is and how its optimal value can be calculated.
Theory – Identify ideal MTU
The MTU (Maximum Transfer Unit) describes the maximum packet size of a protocol. It therefore indicates the maximum size of a data packet, so that it can be transmitted via a protocol. If a data packet is larger, it becomes fragmented – i.e. divided into several packages.
For example, let’s assume that we (=PC) would have a factory for sugar packets and our packet […]

Windows 10: Fix wrong time

Fix-Win-10-wrong-time-problemFor some time, I was plagued by a small, but not less annoying, issue on Windows 10. The system time drifted intermittently one hour off. A manual changeover of the time brought success only in the short term. After a while the clock went wrong again.
The correct time zone and summer/winter time (daylight saving time) were selected in the Windows time and date settings and the automatic synchronization of the time was activated. Nevertheless the Windows clock did what it wants, but not what it was supposed to do.
Finally I found the solution to the problem inside the Windows services menu. The automatic time synchronization service was disabled. Now, after I activated the Windows Time service, the system time is correct again. You can activate the service as follows.

Press Win-Taste + R key
Enter services.msc and click ok, to start […]

Howto fix: Windows 10 freezes and lags after sleep

For some time I was plagued by a little, but rather annoying problem on my Windows 10 PC. Once the computer woke up from sleep mode, it freezes several times per minute for a few seconds. Explorer windows open slowly, websites won’t load and the sound drops out. The mouse was still responsive.
I am not alone with this problem, because I have found several forum threads during my research, where users complaint about this problem. However, I found the solution for this problem, but only after a very long search.
Refine the problem
In almost all forums it was suggested to upgrade the drivers of all hardware, update to a newer BIOS version and/or completely reinstall Windows. However, my drivers have all been updated and also for the BIOS there was no update. A new and clean Windows installation was not an option for me.
Ereignisanzeige Problem nach Sleep
A view […]

How to install unsigned drivers in Windows 10

For several days I am successfully upgraded to Windows 10. Contrary to the experience of some of my family members and friends, who got black screens or even a total failure while updating to Windows 10, my upgrade proceeded extreme smothly. And as much Windows 10 inspires me with it’s new features, there still remains a vexed issue. How to install unsigned drivers under Windows 10? (For Windows 8 and 8.1, I had already written a guide.) Since the release of Windows 10, a few steps in the click sequence have changed, so there is this follow-up article now, which describes how to install unsigned drivers on Windows 10. And here’s how you do!
Install unsigned drivers with Windows 10
In general there are two approaches to install unsigned drivers in Windows 10. Either you enable the test mode in Windows or you restart the computer in a certain mode. I will put the test mode […]