fix process exists

Author: arch

contrib/Installer/mtfg-ofs-extension-installer.py

@@ -80,10 +80,13 @@ def get_download_urls_with_api():
 
 
 def process_exists(process_name):
-    call = 'TASKLIST', '/FI', 'imagename eq %s' % process_name
-    output = subprocess.check_output(call).decode()
-    last_line = output.strip().split('\r\n')[-1]
-    return last_line.lower().startswith(process_name.lower())
+    try:
+        call = 'TASKLIST', '/FI', 'imagename eq %s' % process_name
+        output = subprocess.check_output(call).decode()
+        last_line = output.strip().split('\r\n')[-1]
+        return last_line.lower().startswith(process_name.lower())
+    except:
+        return False
 
 
 def is_latest_version_installed(version_file, version):