It all depends on where the Red Army ends up. If the Red Army has troops in a country, it will go Communist. If it does not, then it probably won't.
Some part of Germany will become part of the Soviet occupation zone. That zone will become Communist if the Western Allies and USSR fall out, and if the Western Allies allow their zone to begin economic reforms. It is not realistic to assume that the Soviets will not have an occupation zone.
Despite what we know will happen, it is important to remember that the victors in WWII did not anticipate the Cold War. Everyone's immediate concern was how to prevent Germany from starting a Third World War or conquering again in another 20-30 years. The leaders of Czechoslovakia made the fatal mistake in cozying up too far with the Soviets preicsely because they wanted to be close to the only major power on their border. If they had shown more foreight and backbone, they would have agreed to the Marshall Plan and possibly avoided the Communist coup that did turn their country into a Soviet satellite.
With that said, let's imagine some differences where the Allies just get some lucky breaks.
First, Operation: Torch is more ambitious. The plan includes landing troops in Tunisia. All of French Northwest Africa falls, and Hitler is unable to load troops into Tunisia. The additional troops and airlift available to the Germans means the diaster at Stalingrad is somewhat lessened.
The original US plan was to seize North Africa in 1942 and invade France in 1943. With a more successful Torch in 1942, this is now possible, but not inevitable. The British will footdrag. Will they convince the Americans that 1943 is not the time to invade? If so, will they convince them to invade Italy instead? This is debateable. Presumably, logistical issues preclude a serious invasion in 1943, and the Americans agree to take Sicily first, and then Italy.
Allies take Sicily in the spring. They invade Italy in the summer of 1943 around the time of the German summer offensive. If they perform better than IOTL, the Allied operation greatly succeeds, they take Rome, but are stopped in the mountains before reaching the Po River Valley. Simultaneously, the British seizet he Dodecanese and Rhodes. Crete falls in a subsequent operation.
As 1943 ends, the other minor Axis nations (Hungary, Romania, and Bulgaria) attempt to make peace with the Allies. They are informed that the Soviet Union must agree first, but allow some discussion. Churchill argues for a Balkans campaign, but the Americans refuse. Contingency plans are drawn up for a diversion of troops to Greece if Bulgaria enters the war and allows for easy invasion. With western troops there, it means Romania could also defect.
Spring 1944 has an offensive in Italy that drives into the north. In June 1944, the Allies invade Normandy. Weeks later, they break out of the bridgehead and intiate a sweeping drive to the West that encircles a large number of Germans. In the north, British and Canadian forces capture Antwerp and the Schedl Estuary, greatly easing logistical restrictions. Allied Armies advance into northern Italy including the French First Army. With the collapse of the Germans in France, and the success in the Balkans, it is determined that the French First Army can enter southern France through Italy and assist in liberating the country.
Churchill insists that the other forces planned for southern France, including the American Seventh Army, be diverted to the Balkans where they would join up with Bulgarian and Romanian troops. Since the Red Army was near Romania, the entire Balkans would be join the anti-Hitler cause in one fell swoop. After much deliberating, the Americans agree.
American and some British troops land in northern Greece in early August 1944 and with Bulgarian help, quickly move inland. Soon after, Romania defects from the Axis and allows Soviet troops to move through their territory. Soviet and American troops meet just outside Transylvania. The Romanian armistice renounces claims to Bessarabia, but establishes the US, UK, and USSR as jointly occupying Romania. Since Bulgaria never declared war on the USSR, only the US and UK are occupying powers.
Soviet troops quickly move into Hungary with Romanian help. In Yugoslavia, Bulgarian and American troops advance in the south, while Tito's partisans and the Red Army seize Belgrade.
Back in western Europe, the improved supply lines allow the Allies to reach and cross the Rhine in September 1944. At this point, it is apparent that Germany has lost the war. German soldiers in the west just begin giving up, while in the East they continue to fight hard. British and American troops advance steadily into Germany.
Warsaw is still held by the Germans, but the Red Army is approaching. Furthermore, Warsaw is now within Allied bomber range. The Polish government in exile reveals its intention to launch a national uprising. Americans and British agree to provide airborne support, including supplies plus the arrival of Polish airborne troops. Stalin is less than enthusiastic, but after Soviet propaganda complaining about the lack of Polish Home Army involvement, his criticism of this plan irritates the Western Allies. The Warsaw Uprising of september 1944 is coordinated with the Western Allies which drop supplies and Polish paratroopers which seize the city in a coup de main. Hitler orders a counterattack, but American and British planes carpet bomb the German positions west of the city from airfields in northern Italy.
By end of October, American troops have reached Vienna and Prague, whiel Soviet troops occupy Budapest and continue to advance in Poland and Slovakia.
At this point, I'm not sure how to proceed as politics begin to take over. Clearly Bulgaria will not go Communist, but Hungary will. Tito will still take over Yugoslavia. It is possible that Romania may escape Communist domination. The Czechoslovakian government in exile will take control in that control as IOTL. Poland is a more tricky question, as Stalin really does not want an independent Poland.
The above really requires a lot of things to go right, and I don't think it's realistic. But it's still within the realm of plausibility.