widgetservice.exe is a program which is most likely NOT a virus or malware. So, if widgetservice.exe is on your PC, it is most likely ok, and will NOT be a cause for concern. Even if your system is clean, it is still recommended to purchase a good antivirus with a good track record, in order to yourself your system against viruses and malware.
The default filename and directory where the program is stored is
C:\Program Files\WindowsApps\MicrosoftWindows.Client.WebExperience_423.29700.0.0_x64__cw5n1h2txyewy\Dashboard\widgetservice.exe.
The MD5 checksum for this executable is c4d4397efb84434af7f8b0245910d8c8.
This application does NOT run as a Windows service. This is normally a good sign.
64-bit code has been detected. This application can put to good use the full power of a modern computer processor.
widgetservice.exe has a digital signature. Today the large majority of clean programs are digitally signed.
The digital signature found in widgetservice.exe verifies as ok. This is excellent.
Digital certificate name: Microsoft Windows
Certificate's issuer name: Microsoft Windows Production PCA 2011
This program does NOT have a removal routine set up in registry.