aspnet_state.exe is a application which is most likely NOT a virus or malware. So, if aspnet_state.exe is on your computer, it is most likely ok, and will NOT cause problems. Even if your system is virus-free, it is still recommended to run a good antivirus with a good track record, in order to defend your system against potential security problems.
Normally, this application is found in C:\Windows\Microsoft.NET\Framework64\v4.0.30319\aspnet_state.exe.
The MD5 fingerprint for this program is 660d597b7a78256734d7f3230b21b355.
This program is a Windows service. This means it runs on your system in background, usually without showing any user interface to you. Most Windows services are legit programs, which provide useful features to other applications or to Windows in general.
This is a 64-bit executable. It uses the full capacity of nowadays' computer processors.
The description stored in the file is Microsoft ASP.NET State Server.
File version stored as a property 4.6.1055.0 built by: NETFXREL2.
Company name Microsoft Corporation.
Intellectual property rights notice © Microsoft Corporation. All rights reserved..
aspnet_state.exe has a digital signature. Nowadays the large majority of virus-free software applications are digitally signed.
The digital signature found in aspnet_state.exe checks out perfectly. This is most likely a clean, ok program.
Digital certificate name: Microsoft Corporation
Certificate's issuer name: Microsoft Code Signing PCA
This executable does NOT have a removal routine set up in registry.