ksde.exe is a application which is most likely NOT a virus or malware. So, if ksde.exe is on your system, it is most likely ok, and will NOT cause problems. Even if your system is clean, we still advise you to purchase a well-known antivirus with a good track record, in order to defend yourself against viruses and malware.
This application is usually found in C:\Program Files\Kaspersky Lab\Kaspersky Secure Connection 1.0\ksde.exe.
The MD5 fingerprint for this file is eff5ea6088db81c6ef6edcda5ee79909.
This application is a Windows service. This means it operates on your PC in background, usually without displaying any user interface to you. Most Windows services are legit programs, which perform useful features to other programs or to Windows in general.
This executable uses the Internet to communicate. Today this is expected from a program. For example, most of the apps on your computer check for new updates. For this, Internet communications are necessary.
This executable runs as a 32-bit program. It does not exploit the entire power of modern computer CPUs. This is quite normal because the makers did not upgrade it to use the x64 instruction set.
The description extracted from the exe is Kaspersky Secure Connection.
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ksde.exe is digitally signed. Nowadays the large majority of clean software applications are digitally signed.
The digital signature attached to ksde.exe verifies as ok. This is most likely a clean, ok program.