dotnet35sp1: Workaround for error if the username is "guest"

src/winetricks

@@ -9480,9 +9480,22 @@ load_dotnet35sp1()
     w_try_cd "${W_TMP}"
     w_try ln -s "${W_CACHE}/${W_PACKAGE}/${file1}" .
 
-    WINEDLLOVERRIDES="ngen.exe=n" w_try_ms_installer "${WINE}" dotnetfx35.exe /lang:ENU ${W_OPT_UNATTENDED:+/q}
+    # Workaround for "You do not have sufficient rights to run this application" error if the username is "guest".
+    TMP_USERNAME="$(echo ${USERNAME} | tr '[:upper:]' '[:lower:]')"
+    if [ "${TMP_USERNAME}" = "guest" ]; then
+        TMP_USERNAME="$(basename $(mktemp -u))"
+        w_try ln -s "${W_DRIVE_C}/users/${USERNAME}" "${W_DRIVE_C}/users/${TMP_USERNAME}"
+    else
+        TMP_USERNAME="${USERNAME}"
+    fi
+
+    WINEUSERNAME="${TMP_USERNAME}" WINEDLLOVERRIDES="ngen.exe=n" w_try_ms_installer "${WINE}" dotnetfx35.exe /lang:ENU ${W_OPT_UNATTENDED:+/q}
     w_try rm dotnetfx35.exe
 
+    if [ "${TMP_USERNAME}" != "${USERNAME}" ]; then
+        w_try rm "${W_DRIVE_C}/users/${TMP_USERNAME}"
+    fi
+
     w_restore_winver
 
     # Doesn't install any ngen.exe